Brakes - Repair - e90 BMW M3 E90

34 00 050 Bleeding brake system with DSC

Note. READ AND COMPLY WITH GENERAL INFORMATION. When replacing or repairing, observe the filling and bleeding instructions for the following parts: Tandem brake master cylinder Hydraulic unit Components and connecting lines which are fitted between these assemblies. Connect bleeder unit with max. 2 bar filling pressure. A second person is needed to help carry out this work.

Unclip retaining tabs (1).

Pull cover (3) out of guide (2) and remove.

Scheme 149

Connect DIS.

Select path: Service functions - Chassis/Suspension - Slip control systems - Bleeding procedure.

Connect brake fluid changer to expansion tank and switch on.

Scheme 150

Always use BMW-approved brake fluids, refer to BRAKES - OPERATING FLUIDS

Fully rinse the brake system

Connect bleeder hose with collecting tray to bleeder valve on rear right brake caliper.

Open bleeder valve and purge until clear, bubble-free brake fluid emerges.

Close bleed valve.

Follow same procedure on rear left, front right and front left wheel brake.

Scheme 151

Bleeding rear-axle brake circuit

Connect bleeder hose with collecting tray to bleeder valve on rear right brake caliper.

Close bleeder valve.

Run bleeding routine with DIS with bleeder valve open.

After completing routine, press brake pedal 5 times to floor; clear and bubble-free brake fluid must flow out.

Close bleed valve.

Repeat procedure at rear left.

Bleeding front-axle brake circuit

Connect bleeder hose with collecting tray to bleeder valve on front right brake caliper.

Close bleeder valve.

Run bleeding routine with DIS with bleeder valve open.

Scheme 152

After completing routine, press brake pedal 5 times to floor, clear and bubble-free brake fluid must flow out.

Close bleed valve.

Repeat procedure at front left.

Switch off brake fluid changer and remove from expansion tank.

Check brake fluid level.

Close expansion tank.

Note. Pay attention to rubber seal (1) in sealing cap.

Scheme 153

34 00... Checking brake discs

Necessary preliminary tasks

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .

Checking thickness difference

1. Measure thickness difference within brake surfaces at 8 point (spread over the circumference) with a micrometer gauge
2. Compare measurement result with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90)

Scheme 154

Check minimum brake disc thickness

1. Position special tool «34 1 280 GAUGE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.
2. Compare measurement result and lowest value with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90)

Scheme 155

34 00 009 Checking brakes on test stand

Necessary preliminary tasks

1. Check tires for damage
2. Check tire treads
3. Checking tire inflation pressure

Scheme 156

The brakes must be at normal operating temperature. To do so, gently warm up the brake disks and brake drums while dry by braking the vehicle several times.

34 00 513 Checking parking brake setting (vehicle check for service)

Note. If deviations are identified during the following check, the parking brake must be adjusted

0th tooth (handbrake released)

Vehicles with manual transmission: Shift lever in neutral position.

Vehicles with automatic transmission: Selector lever in "N" position.

1. Without locking differential < or = 150 N.
2. With locking differential < or = 200 N (possibly odd display).

1st tooth: No increase in braking force with regard to 0th tooth. Indicator lamp can be lit.

2nd tooth: Indicator lamp must be lit.

3rd tooth: Increase in braking force.

5th tooth: The brake force display must have reached > or = 400 N.

Checking brake force differential at wheel

Apply handbrake until a wheel circumferential force (measured on brake test stand) of min. 1000 N is reached.

Max. permitted brake force differential right/left < or = 35 % (referred to greater brake value).

It must be possible to brake with locked wheels with the handbrake.

34 00 010 Checking thickness of brake pad

Note. The thickness of the outer brake pads can be determined without removing the wheels. If necessary, move car until opening for brake pad wear indicator (brake pad) can be seen through rim styling.

Insert special tool 34 1 260 GAUGE rim into opening for brake pad wear indicator.

Press special tool onto brake pad. Slide ring (1) in direction of arrow up to stop and read off measured value.

Note. Brake disc Brake pad with backplate

SAFE LIMIT FOR LINING WEAR, FRONT BRAKE .

SAFE LIMIT FOR LINING WEAR, REAR BRAKE .

Scheme 157

34 00... General Information

The brake system is one of the most important safety systems on any motor vehicle. It is therefore essential to act with utmost care when working on the brake system and to follow the instructions below.

General

1. Ensure cleanliness and only use rags which do not lose lint.
2. Wash away or vacuum up brake dust, do not clear it away using compressed air. This dust is a health hazard.
3. Do not under any circumstances allow any oil or grease to get into the brake system. This would result in a complete malfunction of the brake system.
4. When cleaning brake components with brake cleaner (refer to BMW Parts Service), do not allow brake cleaner to get into in the brake system.
5. Even the most minute traces of brake cleaner must be avoided.

Brake fluid

1. Replace brake fluid at least every two years.
2. Never reuse drained brake fluid.
3. Always use BMW-approved brake fluid, refer to «BRAKES - OPERATING FLUIDS»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-operating-fluids)
4. Dispose of brake fluid in approved appliances only, refer to BMW Service Workshop Equipment Planning documentation.
5. Do not allow brake fluid to drain into drain pipes, into the outside environment or into unsuitable facilities. This would create the risk of groundwater contamination since brake fluid is classed as a fluid that is hazardous to water.
6. Do not allow brake fluid to come into contact with paintwork as this will destroy the paint.
7. Brake fluid must not be allowed to remain on bare skin too long in order to avoid skin problems. Wash skin coated with brake fluid with water and soap.
8. If brake fluid makes contact with eyes, immediately flush with large quantity of clean water and visit eye doctor.

Wheel brakes

1. Brake pads: Brake pads must be replaced when the warning threshold of the brake pad wear indicator See «REAR BRAKE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90) or «FRONT BRAKE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90) is reached. Brake pads must always be replaced on both sides of any axle. The friction surfaces of the brake pads must not come into contact with oil or grease. The brake pads must be replaced if they are fouled by such substances. In the case of rotation-dependent brake pads, make sure the arrow marking points in the direction of rotation of the brake disc for when the vehicle is moving forward. Brake pads with left/right markings must be fitted on the relevant side of the vehicle. One-sided angled areas on the brake pads must be located on the disc contact side of the brake caliper for when the vehicle is moving forward.
2. Brake discs: Brake discs must not be scored or cracked. Furthermore, minimum brake disc thickness See «REAR BRAKE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90) or «FRONT BRAKE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90) , disc runout, parallelism and surface roughness of the friction surfaces must not exceed or drop below the permitted values. Always strip preservative off new parts before installation. With the rear brake discs, also strip preservative off brake drum on parking brake.
3. Always strip preservative off new parts before installation.
4. Brake calipers

Only approved pastes on the basis of glycol must be used for repairs on brake calipers.

All moving parts on the brake caliper must move freely: note grease specifications.

Use only BMW-approved lubricants to grease caliper guides (refer to BRAKES - OPERATING FLUIDS ).

Brake lines, brake hoses

1. Brake lines and brake hoses must be correctly routed and must not abut with body or components in a way which would cause chafing.
2. To prevent damage, release and tighten brake line couplings with a special brake line wrench only.
3. The system must be bled each time any brake lines have been detached.
4. All connection points must be checked for leaks.
5. Only tighten down brake hoses on the front axle when wheels are in straight-ahead position.
6. Close off open connections of brake lines and individual components to prevent dirt from getting into the brake system.
7. When tightening down brake line couplings, observe tightening torque «34 32 1AZ»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-tightening-torques-e90) .

Traction control system

The wheel-slip control system is essentially maintenance-free; however the following must be observed

1. When carrying out welding work with electric welding equipment, be sure to disconnect the plug from the electronic control unit (ignition turned off).
2. During painting work, the control unit may be subjected for brief periods to loads of max. 95°C and for long periods (approx. 2 hours) to loads of max. 85°C.
3. Terminals must be completely tight on end poles of battery.
4. Brake lines on hydraulic unit must not be swapped over: if applicable, mark them prior to disassembly. On completion of repair work, carry out swap-over test with the DIS diagnosis system.

34 00... General information on breaking in new brake discs/brake pads

34 00 012 Parking brake function check

Note. If deviations are identified during the following check, the parking brake must be adjusted

Drive vehicle onto chassis dynamometer.

Warm up brakes.

Check handbrake.

0th tooth (handbrake released)

Vehicles with manual transmission: Shift lever in neutral position.

Vehicles with automatic transmission: Selector lever in "N" position.

1. Without locking differential < or = 150 N.
2. With locking differential < or = 200 N (possibly odd display).

1st tooth: No increase in braking force with regard to 0th tooth. Indicator lamp can be lit.

2nd tooth: Indicator lamp must be lit.

3rd tooth: Increase in braking force.

5th tooth: The brake force display must have reached > or = 400 N.

Checking brake force differential at wheel

Apply handbrake until a wheel circumferential force (measured on brake test stand) of min. 1000 N is reached.

Max. permitted brake force differential right/left < or = 35 % (referred to greater brake value).

It must be possible to brake with locked wheels with the handbrake.

34 00 025 Replacing fluid in brake system

Note. READ AND COMPLY WITH GENERAL INFORMATION.

Only use brake fluids that have been approved by BMW, see BRAKES - OPERATING FLUIDS

Unclip retaining tabs (1).

Pull cover (3) out of guide (2) and remove.

Connect brake fluid changer to expansion tank and switch on.

Note. Check relevant equipment manufacturer's operating instructions for each device. Charging pressure should not exceed 2 bar.

Fully rinse the brake system

Connect bleeder hose with collecting tray to bleeder valve on rear right brake caliper.

Open bleeder valve and purge until clear, bubble-free brake fluid emerges.

Close vent valve.

Follow same procedure on rear left, front right and front left wheel brake.

Note. The clutch slave cylinder must also be scavenged in vehicles with manual transmissions.

Switch off brake fluid changer and remove from expansion tank.

Check brake fluid level. If necessary, top up/draw off to max. level.

Close expansion tank.

Note. Pay attention to rubber seal (1) in sealing cap.

Scheme 158

After installation

1. Reset CBS in the vehicle according to factory specification.

00 Safety information for working on vehicles with automatic engine start-stop function (MSA)

Observe safety precautions when working on MSA vehicles

Before carrying out practical work on the engine, always ensure that the MSA functionality is deactivated so as to prevent automatic engine starting while work is being carried out in the engine compartment.

MSA function is deactivated by

1. Deactivate MSA by means of button (1) in passenger compartment
2. Open seat belt buckle and driver's door

Scheme 159

1. Open engine bonnet/hood and ensure that engine hood/bonnet contact is not in workshop mode Workshop mode A = 10 mm Basic setting (engine hood/bonnet open) B = 7 mm

Scheme 160

To make sure that the engine hood/bonnet contact is at the basic setting, if necessary press the hood/bonnet contact up to the limit position before starting work and slowly release.

When working with diagnosis tools

1. Observe instructions in diagnosis tool

Necessary preliminary tasks

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .

Checking thickness difference

1. Measure thickness difference within brake surfaces at 8 point (spread over the circumference) with a micrometer gauge
2. Compare measurement result with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90)

Check minimum brake disc thickness

1. Position special tool «34 1 280 GAUGE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.
2. Compare measurement result and lowest value with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90)

34 11 552 Overhauling left or right front brake caliper (brake caliper removed)

Note. Use repair kit, refer to BMW Parts Department.

Check guide sleeves (5), fitting repair-kit guide sleeve if necessary.

Scheme 161

Carefully force piston out through connection bore with compressed air.

To protect piston, place a protective plate (e.g. hard wood or hard felt) in caliper recess.

Do not grip piston with fingers - risk of trapping!

Scheme 162

Press off dust sleeve (1).

Scheme 163

Carefully remove sealing ring (1) special tool 009316 WEDGE .

Clean cylinder bores and parts with alcohol and dry with compressed air.

Thoroughly inspect cylinder bore, piston and flange surfaces. Machining of cylinders and pistons is not permitted.

Install new seal.

Scheme 164

Installation

Apply a light coat of brake fluid to cylinder bore, piston and seal

refer to BRAKES - OPERATING FLUIDS .

Fit dust sleeve (1) in annular groove of piston (2).

Scheme 165

Press piston into cylinder bore.

Evenly press dust sleeve (1) onto brake caliper housing as far as it will go.

Installation

The area between the dust sleeve and the brake caliper housing must be kept dry. It must not come into contact with Ate brake cylinder paste or brake fluid so as to ensure that the dust sleeve is perfectly seated.

34 21 812 Overhauling left or right rear brake caliper (brake caliper removed)

Note. Use repair kit, refer to BMW Parts Department.

Check guide sleeves (5), fitting repair-kit guide sleeve if necessary.

Carefully force piston out through connection bore with compressed air.

To protect piston, place a protective plate (e.g. hard wood or hard felt) in caliper recess.

Do not grip piston with fingers - risk of trapping!

Press off dust sleeve (1).

Carefully remove sealing ring (1) special tool 009316 WEDGE .

Clean cylinder bores and parts with alcohol and dry with compressed air.

Thoroughly inspect cylinder bore, piston and flange surfaces. Machining of cylinders and pistons is not permitted.

Install new seal.

Installation

Apply a light coat of brake fluid to cylinder bore, piston and seal, refer to BRAKES - OPERATING FLUIDS .

Fit dust sleeve (1) in annular groove of piston (2).

Press piston into cylinder bore.

Evenly press dust sleeve (1) onto brake caliper housing as far as it will go.

Installation

The area between the dust sleeve and the brake caliper housing must be kept dry. It must not come into contact with Ate brake cylinder paste or brake fluid so as to ensure that the dust sleeve is perfectly seated.

Scheme 166

1. Brake disc
2. Brake pad
3. Brake caliper
4. Brake guard plate
5. Checking thickness of brake pad

34 11 250 Removing and installing/replacing a brake carrier/brake guard plate at front

Necessary preliminary tasks

1. Remove front «BRAKE DISCS»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-11-220-removing-and-installingreplacing)

Release screws (1) and remove brake guard plate (2).

Installation

Tightening torque 34 11 3AZ .

Scheme 167

34 11 020 Removing and installing or replacing front left or right brake caliper (Teves)

Necessary preliminary tasks

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .
2. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .

After completing work: BLEED BRAKING SYSTEM

Press clutch pedal down to floor and secure with pedal support.

Note. The pedal support may only be released when the brake lines are reconnected. This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Scheme 168

If necessary, pull brake hose out of holder (1).

Scheme 169

Disconnect brake hose from brake line (2).

Installation

Tightening torque 34 32 1AZ .

Detach brake hose from brake caliper (4).

Installation

Tightening torque 34 32 2AZ .

Note. First tighten brake hose on brake caliper. Move wheels into straight-ahead position. Insert brake hose in bracket and screw onto brake pipe.

Unscrew guide bolts (1).

Remove brake caliper by pulling upwards.

Installation

Clean guide screws only; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

Tightening torque 34 11 4AZ .

Scheme 170

34 11 220 Removing and installing/replacing both front brake discs

Necessary preliminary tasks

1. Remove «FRONT WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install)
2. Remove and clean «BRAKE PADS»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-11-000-removing-and-installingreplacing)

Note. After completing work, read and comply with notes on BRAKING IN NEW BRAKE DISCS/BRAKE PADS .

Check minimum brake disc thickness

1. Position special tool «34 1 280 GAUGE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.
2. Compare measurement result and lowest value with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90) .

Installation

New brake pads may only be fitted if the brake disc thickness is greater than the MINIMUM BRAKE DISC THICKNESS (MIN TH).

If the brake discs are replaced, you must also fit new brake pads.

Brake discs may only be replaced in pairs (on each axle).

Scheme 171

Release screws (1) and remove brake anchor plate (2).

Installation

Tightening torque 34 11 2AZ .

Scheme 172

Release screws (1) and remove brake disc.

Installation

Brake disc must be correctly seated on guide pins (2).

Replace screw.

Tightening torque 34 11 1AZ .

Scheme 173

34 11 000 Removing and installing/replacing brake pads on both disc brakes (6 pistons Brembo)

Necessary preliminary tasks

1. Remove «FRONT WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .
2. Remove brake pad wear sensor.

Drive out retaining pin (1) in direction of arrow and remove retaining spring (2).

Scheme 174

Release screws (1) and remove brake caliper rearwards(2).

Note. Picture shows E7x M

Installation note

Replace screws (1).

Tightening torque: 110 Nm

Scheme 175

Press back brake pads and piston with special tool 34 1 050 and remove brake pads!

Note. Picture shows E7xM

Scheme 176

Installation note

Rear side of brake pads (1) must be thinly greased with NEVER-SEEZ compound (see Electronic Parts Catalogue).

Scheme 177

Check minimum brake disc thickness

1. Position special tool «34 1 280»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.

Scheme 178

Note. Picture shows E7xM

So as not to damage the surface coating, if possible do not mechanically clean pad guides (2). Clean with a brake cleaner instead.

Scheme 179

Observe installation sequence

1. Insert brake pads in calliper
2. Install brake calliper on wheel carrier

Drive out 3rd retaining pin at bottom of brake calliper side (1) up to limit position.

Scheme 180

Insert 4th retaining spring in brake calliper (see graphic) and press in far enough to drive in top retaining pin.

Graphic shows: retaining spring and retaining pin in installation position

Scheme 181

Note. After completing repair work: Fully depress brake pedal several times so that brake pads contact brake discs. When installing new brake pads at front and rear axles, brake fluid level must be brought up to "MAX" marking. Read and comply with notes on BRAKING IN NEW BRAKE DISCS / BRAKE PADS .

34 11 000 Removing and installing/replacing brake pads on both front disc brakes (M3)

Necessary preliminary work

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .
2. Remove «BRAKE PAD WEAR SENSOR»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-35-001-replacing-a-brake)

Lever out retaining spring (1) in direction of arrow towards rear.

Installation note

Replace retaining spring (1).

Attach retaining spring (1) first at top and bottom and then allow retaining lug (2) to engage in recess of brake caliper housing.

Scheme 182

Remove plastic plugs (1).

Scheme 183

Left

Pull brake pad wear sensor (1) towards rear out of pad.

Release guide screws (2) with special tool 34 1 080 BIT INSERT . Withdraw brake caliper backwards.

Installation note

Only clean guide bolts; do not grease.

Scheme 184

Check threads.

Replace all guide bolts which are not in perfect condition.

Tightening torque 34 11 4AZ .

Press back brake pads and piston with special tool 34 6 320 LEVER .

Scheme 185

Press brake pads inwards and remove.

The two brake pads are seated with a spring in the piston or in the brake caliper housing and must not be mixed up.

Scheme 186

In the event of one-sided brake pad wear, do not change brake pads round.

Observe MINIMUM THICKNESS OF BRAKE LININGS .

Clean brake pads.

Do not apply grease to brake lining backplate.

Check minimum brake disc thickness

1. Position special tool «34 1 280 GAUGE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.
2. Compare measurement result and lowest value with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90) .

Check dust boot (1) for damage and replace if necessary.

Clean contact surface (2) of brake piston with brake cleaner and apply a thin coating of brake pad paste.

Scheme 187

Clean contact surfaces (1) and (2) of brake pad tee heads/brake caliper housing with brake cleaner and apply a thin coating of brake pad paste.

Note. Grease contact surfaces on brake caliper at top and bottom.

Scheme 188

Scheme 189

Brake pad with adhesive film must be installed in each case on the outside in direction of travel!

Detach protective film (1) from brake pad and install pad.

Scheme 190

So as not to damage the surface coating, if possible do not mechanically clean the guide surfaces for the brake pads on the brake caliper mounting bracket. Instead, clean with brake cleaner and apply a thin coating of brake pad paste.

Scheme 191

So as not to damage the surface coating, if possible do not mechanically clean pad guides (1). Instead, clean with brake cleaner and apply a thin coating of brake pad paste.

Scheme 192

Note. After completing work: Fully depress brake pedal several times so that brake pads contact brake discs. When installing new brake pads at front and rear axles, brake fluid level must be brought up to "MAX" marking. Read and comply with notes on BRAKING IN NEW BRAKE DISCS/BRAKE PADS . If necessary, when replacing pads, reset CBS display in accordance with factory specification.

34 11 519 Removing and installing/replacing left or right front brake caliper

Necessary preliminary tasks

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .
2. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .
3. If necessary, replace «BRAKE PAD SENSOR»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-35-001-replacing-a-brake)

After completing work: BLEED BRAKING SYSTEM

Press clutch pedal down to floor and secure with pedal support.

Note. The pedal support may only be released when the brake lines are reconnected. This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

If necessary, pull brake hose out of holder (1).

Disconnect brake hose from brake line (2).

Installation

Tightening torque 34 32 1AZ .

Detach brake hose from brake caliper (4).

Installation

Tightening torque 34 32 2AZ .

Note. First tighten brake hose on brake caliper. Move wheels into straight-ahead position. Insert brake hose in bracket and screw onto brake pipe.

Unscrew guide bolts (1).

Remove brake caliper by pulling upwards.

Installation

Clean guide screws only; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

Tightening torque 34 11 4AZ .

Scheme 193

Necessary preliminary tasks

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .

Checking thickness difference

1. Measure thickness difference within brake surfaces at 8 point (spread over the circumference) with a micrometer gauge
2. Compare measurement result with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90)

Check minimum brake disc thickness

1. Position special tool «34 1 280 GAUGE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.
2. Compare measurement result and lowest value with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90)

Note. Use repair kit, refer to BMW Parts Department.

Check guide sleeves (5), fitting repair-kit guide sleeve if necessary.

Carefully force piston out through connection bore with compressed air.

To protect piston, place a protective plate (e.g. hard wood or hard felt) in caliper recess.

Do not grip piston with fingers - risk of trapping!

Press off dust sleeve (1).

Carefully remove sealing ring (1) special tool 009316 WEDGE .

Clean cylinder bores and parts with alcohol and dry with compressed air.

Thoroughly inspect cylinder bore, piston and flange surfaces. Machining of cylinders and pistons is not permitted.

Install new seal.

Installation

Apply a light coat of brake fluid to cylinder bore, piston and seal, refer to BRAKES - OPERATING FLUIDS .

Fit dust sleeve (1) in annular groove of piston (2).

Press piston into cylinder bore.

Evenly press dust sleeve (1) onto brake caliper housing as far as it will go.

Installation

The area between the dust sleeve and the brake caliper housing must be kept dry. It must not come into contact with Ate brake cylinder paste or brake fluid so as to ensure that the dust sleeve is perfectly seated.

Scheme 194

1. Brake disc
2. Brake pad
3. Brake caliper
4. Brake guard plate
5. Checking thickness of brake pad

34 21 320 Removing and installing or replacing both rear brake discs

Necessary preliminary tasks

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .
2. Remove and clean «BRAKE PADS»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-21-200-removing-and-installing)

After completing work

1. Adjusting «PARKING BRAKE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-10-014-adjusting-handbrake)
2. Read and comply with notes on «BRAKING IN NEW BRAKE DISCS/BRAKE PADS»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information-on-breaking) .

Check minimum brake disc thickness

1. Position special tool «34 1 280 GAUGE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.
2. Compare measurement result and lowest value with setpoint value.

New brake pads may only be fitted if the brake disc thickness is greater than the minimum brake disc thickness (MIN TH).

If the brake discs are replaced, you must also fit new brake pads.

Always replace brake discs in pairs.

Release bolts (1) and detach brake anchor plate.

Installation

Tightening torque 34 21 2AZ .

Scheme 195

Scheme 196

34 21 200 Removing and installing or replacing brake pads on both rear disc brakes (TRW floating caliper)

Necessary preliminary tasks

1. Remove Wheels
2. Remove Rear Brake Pad Wear Sensor

Release guide screw (1).

If necessary, grip at hexagon head.

Tilt brake caliper upwards.

Installation

Replace guide screws.

For tightening torque refer to 34 21 5AZ .

Scheme 197

Remove brake pads (1) in direction of arrow from brake console.

Observe MINIMUM THICKNESS OF BRAKE PADS

Clean brake pads.

Do not apply grease to brake pad backplate.

Scheme 198

Check minimum brake disc thickness

1. Position special tool «34 1 280»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.
2. Compare measurement result and lowest value with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90__34-21-rear-brake-discs-e90) .

New brake pads may only be installed if the brake disc thickness is greater than or equal to the MINIMUM BRAKE DISC THICKNESS (MIN TH) .

Press brake piston fully back with special tool 34 1 050 .

Scheme 199

Check dust sleeve (1) for damage and replace if necessary.

Clean contact face (2) of brake piston and apply a thin coating of anti-squeak compound.

Scheme 200

Clean contact face (1) of brake caliper and apply a thin coating of anti-squeak compound.

Scheme 201

Clean hammerhead guides and apply a thin coating of anti-squeak compound.

Scheme 202

Note. After completing work: Fully depress brake pedal several times so that brake pads contact brake discs. When installing new brake pads at front and rear axles, brake fluid level must be brought up to "MAX" marking. Read and comply with notes On BREAKING IN NEW BRAKE DISCS / BRAKE PADS . When replacing linings, reset CBS display in accordance with factory specification.

Replacement

Remove lining retaining springs (1).

Installation

Clean contact face of brake carrier and apply a thin coating of anti-squeak compound.

Scheme 203

34 21 200 Removing and installing or replacing brake pads on both rear disc brakes (Teves floating caliper)

So as not to damage the surface coating, if possible do not mechanically clean the guide surfaces for the brake pads on the brake caliper mounting bracket. Instead, clean with brake cleaner BMW part no. 83 19 2 154 780 and apply a thin coating of brake pad paste BMW part no. 83 19 2 158 851.

Necessary preliminary work

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .
2. Remove «BRAKE PAD WEAR SENSOR»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-35-003-replacing-a-brake)

Lift out retaining spring (1).

Scheme 204

Remove cover plug (1).

Scheme 205

Unscrew guide bolts (1).

Remove brake caliper (2) by pulling forward.

Installation note

Tightening torque 34 21 4AZ .

Scheme 206

Clean guide screws only; do not grease.

Check threads.

Replace all guide bolts which are not in perfect condition.

Remove outer brake pad.

Inner brake pad is located with its spring in the piston.

Scheme 207

Clean brake pads.

Do not grease backs of brake pads sleeve.

Turn piston back fully with special tool 34 1 050 DEVICE .

Scheme 208

Check minimum brake disc thickness

1. Position special tool «34 1 280 GAUGE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-special-tools-e90) at three measuring points in area (1) and measure.
2. Compare measurement result and lowest value with «SETPOINT VALUE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-technical-data-e90) .

Check dust boot (1) for damage and replace if necessary.

Clean contact surface (2) of brake piston with brake cleaner and apply a thin coating of brake pad paste.

Clean contact surfaces (1) of brake pad tee heads/brake caliper housing with brake cleaner and apply a thin coating of brake pad paste.

Scheme 209

Clean contact surface (1) of brake caliper with brake cleaner and apply a thin coating of brake pad paste.

Scheme 210

So as not to damage the surface coating, if possible do not mechanically clean the guide surfaces (1) for the brake pads on the brake caliper mounting bracket.

Instead, clean with brake cleaner and apply a thin coating of brake pad paste.

Scheme 211

Note. After completing work: Fully depress brake pedal several times so that brake pads contact brake discs. When installing new brake pads at front and rear axles, brake fluid level must be brought up to "MAX" marking. Read and comply with notes on BRAKING IN NEW BRAKE DISCS/BRAKE PADS . When replacing pads, reset CBS display in accordance with factory specification.

34 21 745 Removing and installing or replacing rear left or right brake caliper (Teves)

Necessary preliminary tasks

1. Remove «WHEEL»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install)
2. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .

After completing work: BLEED BRAKE SYSTEM .

Press clutch pedal down to floor and secure with pedal support.

Note. The pedal support may only be released when the brake lines are reconnected. This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Disconnect brake hose from brake line (1).

Installation

Tightening torque 34 32 1AZ .

Scheme 212

Detach brake hose from brake caliper (3).

Installation

Tightening torque 34 32 3AZ .

Note. First tighten brake hose on brake caliper. Insert brake hose in bracket and screw onto brake pipe.

Lift out retaining spring (1).

Remove cover plug (1).

Pull brake pad wear sensor out of brake pad (right side only).

If necessary, replace brake pad wear sensor.

Unscrew guide bolts (1).

Remove brake caliper (2) by pulling forward.

Installation

Tightening torque 34 21 4AZ .

Clean guide screws only; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

Scheme 213

Remove outer brake pad.

Inner brake pad is located with its spring in the piston.

Clean brake pads.

Do not grease backs of brake pads sleeve.

34 21 173 Replacing rear left (or right) brake carrier

Necessary preliminary tasks

1. Remove «EXPANDER LOCK»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-41-250-removing-and-installingreplacing)
2. Remove «WHEEL HUB»(/bmw/m3/e90-2007-2013/remont/axle-shafts/#rear-axle-repair-e90__33-41-151-replacing-wheel-bearing)

Release screws (1).

Installation

Tightening torque 34 21 3AZ .

Release screws (2) and remove brake carrier (3).

Installation

Tightening torque 34 21 3AZ .

Scheme 214

Scheme 215

1. Expansion tank
2. Brake master cylinder
3. Non-return valve
4. Brake booster
5. Vacuum hose
6. Bleed braking system

34 31 181 Removing and installing/replacing expansion tank for hydraulic brake actuation

Necessary preliminary tasks

1. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .
2. Remove lower section of microfilter housing See «6431062 REMOVING AND INSTALLING/REPLACING LEFT LOWER MICROFILTER HOUSING SECTION»(/bmw/m3/e90-2007-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair-e90__64-31-062-removing-and-installingreplacing) or «6431063 REMOVING AND INSTALLING/REPLACING RIGHT LOWER MICROFILTER HOUSING SECTION»(/bmw/m3/e90-2007-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair-e90__64-31-063-removing-and-installingreplacing)

Note. Extract brake fluid out of expansion tank. Use a suction bottle used exclusively for drawing off brake fluid.

Do not reuse drawn out brake fluid.

Scheme 216

Pull off supply hose (1) of clutch hydraulic system if necessary.

Unfasten plug connection (2) and disconnect.

Unlock quick-release fastener (3) and disconnect vacuum line.

Feed brake line out of rubber grommet and remove cover (4).

Unclip locking pin (1) from retaining lugs (2) and pull out locking pin.

Pull expansion tank in direction of arrow vertically out of brake master cylinder.

Scheme 217

Scheme 218

After installation

1. «BLEED BRAKING SYSTEM»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-050-bleeding-brake-system)

34 31 505 Removing and installing/replacing master brake cylinder for DSC

Necessary preliminary tasks

1. Remove «EXPANSION TANK»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-31-181-removing-and-installingreplacing) .
2. Remove «FOOTWELL TRIM»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e90__51-45-185-removing-and-installingreplacing) .
3. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .

Remove locking clip (1) and disengage and pull out locking pin.

Slacken nuts (2).

Installation

Replace self-locking nuts.

Tightening torque 35 11 1AZ .

Scheme 219

Unfasten brake lines (1).

Installation

Tightening torque 34 32 1AZ .

Scheme 220

Close off brake lines and brake master cylinder with plugs 32 1 270 PLUG .

If necessary, detach line (3) from hydraulic unit and press downwards slightly.

Installation

Tightening torque 34 32 1AZ .

Release nuts (2) and feed brake master cylinder out of brake booster.

Installation

Replace self-locking nuts.

Tightening torque 34 31 1AZ .

Installation

Replace sealing ring.

Scheme 221

Installation

When inserting the brake master cylinder (2) into the brake booster (1), make sure the pressure rod of the brake booster and that of the brake master cylinder meet each other on one level.

Scheme 222

After installation

1. «BLEEDING BRAKE SYSTEM WITH DSC»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-050-bleeding-brake-system)

Scheme 223

1. Brake hose, front
2. Brake tubes
3. Brake hose, rear

34 32 861 Replacing all brake pipes

Note. The brake lines are only supplied in the straight version and correct length with connecting nipple. Read and comply with GENERAL INFORMATION . After completing work, BLEED BRAKE SYSTEM . OBSERVE SAFETY INSTRUCTIONS ON RAISING THE VEHICLE .

The new brake lines are bent into shape with bending tool 34 5 100 DEVICE .

Removed brake pipes can be used as templates for bending.

Scheme 224

Installation

Tightening torque 34 32 1AZ .

34 32 881 Replacing front left or right brake hose

Note. Read and comply with GENERAL INFORMATION .

After completing work: BLEED BRAKING SYSTEM

Press clutch pedal down to floor and secure with pedal support.

Note. The pedal support may only be released when the brake lines are reconnected.

This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Vehicles up to model year approx. 07/05

Pull brake hose out of holder (1).

Detach brake hose from brake line (2).

Installation

Tightening torque 34 32 1AZ .

Detach brake hose from brake caliper (4).

Installation

Tightening torque 34 32 2AZ .

Vehicles as of model year approx. 07/05

Pull brake hose out of both holders (1).

Scheme 225

Detach brake hose from brake line (3).

Installation

Tightening torque 34 32 1AZ .

Detach brake hose from brake caliper (4).

Installation

Tightening torque 34 32 2AZ .

34 32 980 Replacing rear left or right brake hose (between brake caliper and pipe)

Note. Read and comply with GENERAL INFORMATION .

After completing work: BLEED BRAKING SYSTEM

Press clutch pedal down to floor and secure with pedal support.

Note. The pedal support may only be released when the brake lines are reconnected.

This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Never twist brake hose when installing it and avoid all contact with parts attached rigidly to the body.

Disconnect brake hose from brake line (1).

Installation

Tightening torque 34 32 1AZ .

Detach brake hose from brake caliper (3).

Installation

Tightening torque 34 32 3AZ .

Installation

First tighten brake hose on brake caliper.

Insert brake hose in bracket and screw onto brake pipe.

34 32 951 Replacing rear left or right brake hose (between rear axle carrier and body)

Necessary preliminary tasks

1. Remove «REAR LEFT WHEEL»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install)

Note. Read and comply with GENERAL INFORMATION . After completing work: BLEED BRAKE SYSTEM .

Press clutch pedal down to floor and secure with pedal support.

Note. The pedal support may only be released when the brake lines are reconnected. This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Scheme 226

Disconnect brake hose from brake line (1).

Detach brake hose from brake line (2) and remove brake hose (3).

Installation

Tightening torque 34 32 1AZ .

Installation

Use torque wrench (Hazet 6282-1CT with reversible ratchet head).

Tighten brake line using torque wrench (1) and special tool 34 3 170 SOCKET WRENCH .

Scheme 227

34 33 505 Removing and installing or replacing brake booster

Necessary preliminary tasks

1. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .
2. Remove «BRAKE MASTER CYLINDER»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-31-505-removing-and-installingreplacing)
3. Remove «HYDRAULIC UNIT»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-51-527-removing-and-installingreplacing)
4. Remove left «FOOTWELL TRIM»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e90__51-45-185-removing-and-installingreplacing)

Detach locking clip (1) from brake pedal, disengage and pull out locking pin.

Unscrew nuts (2).

Installation

Replace self-locking nuts.

Tightening torque 35 11 1AZ .

Brake lines must not be bent.

Carefully pull brake booster (1) out of bulkhead and tilt out.

If necessary, disengage brake line from holder on bulkhead and press slightly to one side.

Replacement

Modify NON-RETURN VALVE .

Scheme 228

34 33 075 Removing and installing/replacing vacuum pump (S65)

Necessary preliminary tasks

1. «READ AND COMPLY WITH GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .
2. Remove «FRONT LEFT WHEEL»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install)

Release screws (1).

Press wheel arch cover (2) forwards slightly in direction of arrow.

Scheme 229

Unlock quick-release fastener (2) and detach vacuum hose.

Disconnect plug connection (4).

Release nut (3) and pull vacuum pump (1) upwards out of bracket.

Scheme 230

34 33 071 Replacing vacuum hose for brake booster (on brake booster)

Necessary preliminary tasks

1. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .
2. Remove «BRAKE MASTER CYLINDER»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-31-505-removing-and-installingreplacing)

Unlock quick-release fastener (1) and pull out vacuum line (2).

Scheme 231

Disconnect plug connection (1) from differential pressure sensor.

Unfasten hose clip (2).

Pull off vacuum hose (3).

Pull vacuum hose (4) out of brake booster.

Feed out vacuum hose (4).

Installation

Replace hose clamp (2).

Check sealing ring (5) in brake booster and replace if necessary.

Scheme 232

34 35 001 Replacing a brake pad sensor (front)

If a brake pad sensor that has already been ground has to be replaced even though the minimum brake pad thickness has not yet been reached, you must observe the following: The new sliding contact must be filed down with a file to the same length as the ground sliding contact.

Necessary preliminary tasks

1. Remove «WHEEL»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install)

Open plug housing (1).

Disconnect plug connection (2).

Feed brake pad sensor out of holders (3).

Scheme 233

Press clip (1) together and detach brake pad sensor (2) in direction of arrow from brake pad (3).

Installation

Make sure clip (1) and brake pad sensor (2) are correctly seated in brake pad (3).

Scheme 234

34 35 003 Replacing a brake pad sensor (rear)

If a brake pad wear sensor that has already been ground has to be replaced even though the minimum brake pad thickness has not yet been reached, you must observe the following: The new sliding contact must be filed down with a file to the same length as the ground sliding contact.

Necessary preliminary tasks

1. Remove rear right «WHEEL»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install)

Slacken nut (1).

Pull wheel arch trim (2) gently to one side.

Disengage cable from holders (3).

Scheme 235

Disconnect plug connection (1).

Installation

Ensure proper locking of the plug connector and proper seating of the cable in the brackets.

Scheme 236

Disengage cable from holders (1).

Detach brake pad wear sensor (2) in direction of arrow from brake caliper (3).

Installation

Make sure holders (1) and brake pad wear sensor (2) are correctly seated in brake caliper.

Scheme 237

34 10 014 Adjusting handbrake

Perform inspection in the following manner

When 1st ratchet is engaged, no braking force should be exerted.

The difference in wheel circumferential forces between the left and right wheels may deviate by max. 30 % from the greater value (measured on brake analyzer).

In event of larger deviations of wheel circumferential force: carry out readjustment.

Braking with locked wheels must be possible with the parking brake.

The parking brake must be reset if the actuation stroke is greater than 10 teeth.

Note. Accurate adjustment of the parking brake is only possible if the parking brake Bowden cables and all moving parts on the parking brake move easily and function correctly. Basic setting of the parking brake is required: Parking brake shoes and attachment parts are replaced Brake discs are replaced In event of excessive actuation stroke (10 teeth) When replacing parking brake Bowden cables

1. Adjusting instructions for brake shoes (basic setting)

Unclip GAITER for parking brake lever.

Lock adjuster unit (ASZE).

Actuate parking brake lever. Insert special tool 32 1 030 LEVER . Press stop (1) of adjusting spring back to such an extent that retaining hook (2) engages in stop (1).

Scheme 238

Completely unscrew one wheel stud on each rear wheel.

Installation

Tightening torque 36 10 1AZ .

Turn wheel until adjustment screw is visible in tapped hole.

Scheme 239

Turn adjusting screw with a screwdriver until wheel can not be turned anymore by hand.

Then at adjusting screw

1. Release 185 dia. duo-servo brake 8 notches
2. Release 160 dia. duo-servo brake 9 notches

Scheme 240

Unlock adjuster unit (ASZE).

Lever out restraining hook (2) with a suitable screwdriver.

Restraining hook (2) must detach from stop (1) of adjusting spring.

2. Adjusting instructions for parking brake Bowden cables

The parking brake lever must be applied 5 times with medium hand force.

2.1 On brake test stand

0th tooth (parking brake released): Vehicles with manual transmission: Shift lever in neutral position.

Vehicles with automatic transmission: Selector lever position "N".

1. Without locking differential < or = 150 N.
2. With locking differential < or = 200 N (possibly odd display).

1st tooth: No increase in braking force with regard to 0th tooth. Indicator lamp can be lit.

2nd tooth: Indicator lamp must be lit.

3rd tooth: Increase in braking force.

5th tooth: The brake force display must have reached > or = 400 N.

Checking brake force differential at wheel

Apply parking brake until a wheel circumferential force (brake force display) of min. 1000 N is reached.

Max. permitted brake force differential right/left < or = 35 % (referred to greater brake value).

3. Bedding in the duo-servo parking brake

The following braking-in procedures are applicable in case of insufficient braking effect or after replacing brake discs and/or brake shoes.

34 00... General information on braking in new brake discs/brake pads

Scheme 241

1. Handbrake lever
2. Guide tube
3. Handbrake shoes
4. Expander lock
5. Handbrake Bowden cables
6. Adjusting handbrake

34 41 000 Removing and installing/replacing handbrake lever

Necessary preliminary tasks

1. Disconnect «BATTERY NEGATIVE LEAD»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#general-electrical-system-repair-e90__61-20-900-disconnecting-and-connecting)
2. Remove «AIRBAG CONTROL UNIT»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#audio-navigation-anti-theft-restraint-repair-e90__65-77-016-removing-and-installingreplacing)

Note. If the parking brake lever is replaced, the handbrake lever grip must also be replaced.

Lock adjuster unit (ASZE).

Actuate parking brake lever. Connect special tool 32 1 030 LEVER . Press stop (1) of adjusting spring back to such an extent that retaining hook (2) engages in stop (1).

Installation

Unlock adjuster unit (ASZE).

Lever out restraining hook (2) with a suitable screwdriver.

Restraining hook (2) must detach from stop (1) of adjusting spring.

Release screws (1).

Tightening torque 34 41 5AZ .

Remove bracket for center console (2).

Scheme 242

Disconnect cable (1) from handbrake check switch.

Unclip cable bracket (2) at point (3).

Remove cable bracket and place forward.

Scheme 243

Press retainer (1) in balance arm (2) forward in direction of arrow.

Detach handbrake Bowden cables (3) from balance arm (2).

Scheme 244

Release nuts (1) and remove parking brake lever (2).

Installation

Replace self-locking nuts.

Tightening torque 34 41 1AZ .

Parking brake lever and adjustment unit (ASZE) are only exchanged completely as a single unit.

Scheme 245

34 41 120 Removing and installing or replacing both handbrake Bowden cables

Necessary preliminary tasks

1. Remove «AIRBAG CONTROL UNIT»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#audio-navigation-anti-theft-restraint-repair-e90__65-77-016-removing-and-installingreplacing)

Note. After completing work: Adjusting PARKING BRAKE

Lock adjuster unit (ASZE).

Actuate parking brake lever. Connect special tool 32 1 030 LEVER . Press stop (1) of adjusting spring back to such an extent that retaining hook (2) engages in stop (1).

Scheme 246

Press retainer (1) in balance arm (2) forward in direction of arrow.

Detach handbrake Bowden cables (3) from balance arm (2).

Release screw (1) and remove holder (2).

Installation

Tightening torque 34 41 2AZ .

Scheme 247

Note. To release the parking brake Bowden cable from the expander lock, it is necessary to remove the BRAKE DISC on the following vehicles: E90 320xd, 325xi, 328xi, 330i, 330xi, 330d, 330xd, 335i, 335xi, 335d, M3 All E91 E92 320xd, 325xi, 325d, 328xi, 330i, 330xi, 330d, 330xd, 335i, 335xi, 335d, M3 E93 320i, 323i, 325i, 325d, 328i, 330i, 330d, 335i, M3 All E84

Release one wheel stud.

Bring wheel into position (tapped hole turned down approx. 20° from horizontal).

F = direction of travel

Installation

Reinstall wheel stud only after handbrake has been adjusted.

Tightening torque 36 10 1AZ .

Scheme 248

Nipple (1) and expander lock (2) are visible through tapped hole.

Push in core of handbrake cable in direction of expander lock as far as it will go and grip firmly.

Press nipple (1) downwards through tapped hole with a screwdriver.

Pull handbrake cables out of wheel carrier.

Scheme 249

Installation

Insert handbrake cable into brake carrier/brake guard plate. Sleeve must be inserted up to stop.

Nipple of handbrake cable must audibly snap into place in expander lock.

Disconnect handbrake cables from holders (1).

Pull handbrake cables towards rear out of guide tube.

Scheme 250

34 41... Removing and installing or replacing gaiter for handbrake lever

Unclip gaiter with special tool 00 9 317 WEDGE .

Scheme 251

Pull gaiter (1) over handbrake lever.

Cut cable ties (2) and remove gaiter.

Installation

Eye of cable tie must face downward

Scheme 252

34 41 140 Removing and installing or replacing guide tube for handbrake cables

Necessary preliminary tasks

1. Disconnect «BATTERY NEGATIVE LEAD»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#general-electrical-system-repair-e90__61-20-900-disconnecting-and-connecting)
2. Remove «AIRBAG CONTROL UNIT»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#audio-navigation-anti-theft-restraint-repair-e90__65-77-016-removing-and-installingreplacing)
3. Remove «PROPELLER SHAFT»(/bmw/m3/e90-2007-2013/remont/driveshaft-universal-joints/#propeller-shaft-repair-e90__26-11-000-removing-and-installing)

Lock adjuster unit (ASZE).

Actuate parking brake lever. Position special tool 32 1 030 LEVER . Press stop (1) of adjusting spring back to such an extent that retaining hook (2) engages in stop (1).

Installation

Unlock adjuster unit (ASZE).

Lever out restraining hook (2) with a suitable screwdriver.

Restraining hook (2) must detach from stop (1) of adjusting spring.

Press retainer (1) in balance arm (2) forward in direction of arrow.

Detach handbrake Bowden cables (3) from balance arm (2).

Pull handbrake cables out of guide tube.

Release screws (1).

Release screws (2) and feed out guide tube (3) towards bottom.

Installation

Replace seal.

Tightening torque 34 41 4AZ .

Scheme 253

After installation

1. Adjusting «PARKING BRAKE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-10-014-adjusting-handbrake)

34 41 220 Removing and installing/renewing all parking brake shoes

Necessary preliminary tasks

1. Remove rear «BRAKE DISC»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-21-320-removing-and-installing)

Lock adjuster unit (ASZE).

Actuate parking brake lever. Connect special tool 32 1 030 LEVER . Press stop (1) of adjusting spring back to such an extent that retaining hook (2) engages in stop (1).

Installation

Unlock adjuster unit (ASZE).

Lever out restraining hook (2) with a suitable screwdriver.

Restraining hook (2) must detach from stop (1) of adjusting spring.

Scheme 254

Disconnect return spring (1) with brake spring pliers.

Installation

Return spring (1) must not be overelongated.

Check and if necessary replace return spring (1).

Pay attention to installation position of adjusting screw (2).

Apply a thin coat of grease to bush and screw threads.

Scheme 255

Disconnect return spring (1) with brake spring pliers.

Installation

Return spring (1) must not be overelongated.

Check and if necessary replace return spring (1).

Scheme 256

Twist roll pins (1) 90° with special tool 34 4 000 and detach.

Remove brake pads (2).

Scheme 257

After installation

1. Adjusting «PARKING BRAKE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-10-014-adjusting-handbrake)

34 41 250 Removing and installing/replacing expander for parking brake shoes

Necessary preliminary tasks

1. Remove «PARKING BRAKE SHOES»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-41-220-removing-and-installingrenewing)

Lock adjuster unit (ASZE).

Actuate parking brake lever. Insert special tool 32 1 030 LEVER . Press stop (1) of adjusting spring back to such an extent that retaining hook (2) engages in stop (1).

Installation

Unlock adjuster unit (ASZE).

Lever out restraining hook (2) with a suitable screwdriver.

Restraining hook (2) must detach from stop (1) of adjusting spring.

Pull brake shoe expander (1) forward, disconnect parking brake Bowden cable (2) and remove brake shoe expander.

Scheme 258

After installation

1. Adjusting «PARKING BRAKE»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-10-014-adjusting-handbrake)

34 41 071 Replacing handle for handbrake lever

Necessary preliminary tasks

1. Remove «GAITER FOR HANDBRAKE LEVER»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-41-removing-and-installing-or)

Pull off handle for handbrake lever (1) in direction of arrow.

Installation

Handbrake lever grip (1) must snap audibly into place.

Scheme 259

34 51 527 Removing and installing/replacing DSC hydraulic unit

Necessary preliminary work

1. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .
2. Remove lower section of microfilter housing See «6431062 REMOVING AND INSTALLING/REPLACING LEFT LOWER MICROFILTER HOUSING SECTION»(/bmw/m3/e90-2007-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair-e90__64-31-062-removing-and-installingreplacing) or «6431063 REMOVING AND INSTALLING/REPLACING RIGHT LOWER MICROFILTER HOUSING SECTION»(/bmw/m3/e90-2007-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair-e90__64-31-063-removing-and-installingreplacing)
3. Extract brake fluid

Note. Extract brake fluid out of expansion tank. Use a suction bottle used exclusively for drawing off brake fluid.

Do not reuse drawn out brake fluid.

After completing work

1. Bleed «BRAKING SYSTEM»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-050-bleeding-brake-system)

Press cover (2) slightly to one side and disconnect plug connection (1).

Unfasten brake lines (3).

Installation note

Tightening torque 34 32 1AZ .

Scheme 260

Unscrew nuts (1).

Installation note

Tightening torque 34 51 6AZ .

Scheme 261

Tilt out hydraulic unit (1) in direction of side panel.

Scheme 262

When replacing hydraulic unit

Release screws (1) and convert holder (2).

Installation note

Tightening torque 34 51 5AZ .

Modify DSC CONTROL UNIT .

Scheme 263

When replacing control unit

1. Carry out Vehicle programming and encoding
2. «ADJUSTMENT OF STEERING ANGLE SENSOR»(/bmw/m3/e90-2007-2013/remont/manual-power-steering/#steering-and-wheel-alignment-repair-e90__61-31-996-carrying-out-steering)
3. Brake line mix-up test

Scheme 264

1. DSC sensor
2. Pulse sensor, rear
3. Pulse sensor, front
4. DSC control unit

34 52 516 Removing and installing/replacing DSC control unit

Necessary preliminary tasks

1. Remove «HYDRAULIC UNIT»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-51-527-removing-and-installingreplacing)

Release screws (1) and carefully detach control unit (2) towards front.

Scheme 265

Scheme 266

Installation

Keep sealing faces clean.

Replace screws.

Observe tightening sequence (1-4).

Tightening torque 34 51 1AZ .

Scheme 267

Replacement

1. Carry out Vehicle programming and encoding
2. «STEERING ANGLE SENSOR ADJUSTMENT»(/bmw/m3/e90-2007-2013/remont/manual-power-steering/#steering-and-wheel-alignment-repair-e90__61-31-996-carrying-out-steering) or «ADJUSTMENT FOR ACTIVE STEERING»(/bmw/m3/e90-2007-2013/remont/manual-power-steering/#steering-and-wheel-alignment-repair-e90__32-10-005-adjustment-for-active)
3. Brake line interchange check
4. Function check, hydraulic unit

34 52 550 Removing and installing/replacing DSC sensor

Necessary preliminary tasks

1. Remove «LEFT FRONT SEAT»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e90__52-13-000-removing-and-installing)
2. Remove «FRONT LEFT ENTRANCE COVER STRIP»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e90__51-47-000-removing-and-installingreplacing)

Lift carpet (1) and fold back to side.

Remove underlay (2).

Disconnect plug connection.

Installation

Ensure proper locking of plug connector.

Slacken screws (3)

Release screws (4) and remove bracket with yaw sensor.

Installation

Tightening torque 34 51 3AZ .

Scheme 268

When replacing DSC sensor

Release screws (1) and modify DSC sensor (2).

Installation

Tightening torque 34 51 2AZ .

Scheme 269

Carry out calibration/adjustment of DSC sensor.

34 52 700 Replacing DSC hydraulic control unit (valve block)

Necessary preliminary work

1. Remove «HYDRAULIC UNIT»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-51-527-removing-and-installingreplacing) .
2. Immediately close off all hydraulic connections with protective caps!
3. Clean outside of control unit.

Release screws (1).

Firmly hold pump motor (3) together with valve block (4).

Carefully detach control unit (2).

Scheme 270

Scheme 271

Take valve block (2) out of packaging (part number 67 97 896).

Place valve block (2) straight on control unit (1) without twisting.

Installation note

Replace screws (3).

Tightening torque 34 51 1AZ

Scheme 272

Installation note

1. When installing the hydraulic unit, only remove retaining tab (4) and screw plug (5) directly before connecting the brake lines.
2. Brake line mix-up test
3. Bleed «BRAKING SYSTEM»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-050-bleeding-brake-system)

34 52 535 Replacing a rear pulse sensor

Necessary preliminary tasks

1. Remove «WHEELS»(/bmw/m3/e90-2007-2013/remont/wheel-tire-system/#wheel-and-tires-repair-e90__36-10-300-remove-or-install) .
2. Read and comply with «GENERAL INFORMATION»(/bmw/m3/e90-2007-2013/remont/mechanical-hydraulic/#brakes-repair-e90__34-00-general-information) .

Slacken nut (1).

Pull wheel arch trim (2) gently to one side.

Disengage cable from holders (3).

Scheme 273

Disconnect plug connection (1).

Installation

Ensure proper locking of the plug connector and proper seating of the cable in the brackets.

Scheme 274

Disengage cable from holders (1).

Unfasten socket head cap screw (2).

Withdraw wheel speed sensor (3) from bore hole.

Installation

Tightening torque 34 51 4AZ .

Clean bore for pulse generator and lubricate with Staburags NBU 12/K grease.

Scheme 275

34 52 525 Replacing one front pulse sensor

Note. Read and comply with GENERAL INFORMATION .

Open plug housing (1), pull plug connection (2) out of bracket and disconnect.

Pull cable with rubber grommet out of holders (3).

Installation

Ensure proper locking of plug connector and proper seating of rubber grommets.

Scheme 276

Release hexagon socket head cap screw (1) and pull wheel speed sensor (2) out of bore.

Installation

Tightening torque 34 51 4AZ .

Clean bore for pulse generator and lubricate with Staburags NBU 12/K grease.

Scheme 277

See also:
• BRAKES - OPERATING FLUIDS
• WHEELS
• SETPOINT VALUE
• 34 1 280 GAUGE
• 34 32 1AZ
• 009316 WEDGE
• MINIMUM THICKNESS OF BRAKE PADS
• WHEEL HUB
• 6431062 REMOVING AND INSTALLING/REPLACING LEFT LOWER MICROFILTER HOUSING SECTION
• 6431063 REMOVING AND INSTALLING/REPLACING RIGHT LOWER MICROFILTER HOUSING SECTION
• FOOTWELL TRIM
• 32 1 270 PLUG
• OBSERVE SAFETY INSTRUCTIONS ON RAISING THE VEHICLE
• 36 10 1AZ
• BATTERY NEGATIVE LEAD
• AIRBAG CONTROL UNIT
• PROPELLER SHAFT
• ADJUSTMENT OF STEERING ANGLE SENSOR
• PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION)
• ADJUSTMENT FOR ACTIVE STEERING
• LEFT FRONT SEAT
• FRONT LEFT ENTRANCE COVER STRIP
• READ AND COMPLY WITH GENERAL INFORMATION.
• BRAKE TESTING ON TEST STAND
• BLEEDING BRAKE SYSTEM WITH DSC
• BRAKE DISCS
• BLEED BRAKING SYSTEM
• BRAKE PADS
• BRAKING IN NEW BRAKE DISCS/BRAKE PADS
• BRAKE PAD WEAR SENSOR
• BRAKE PADS
• PARKING BRAKE
• BRAKE DISCS
• BRAKE PAD WEAR SENSOR
• EXPANDER LOCK
• EXPANSION TANK
• BRAKE MASTER CYLINDER
• HYDRAULIC UNIT
• NON-RETURN VALVE
• GAITER
• PARKING BRAKE SHOES
• DSC CONTROL UNIT