Fuel System - Repair Instructions - x5 (3.0l) BMW X5 E53

13 00 002 Checking function of Digital Engine Electronics (DME)

Diagnostic Connector In Engine Compartment

Connect up MoDiC or BMW DIS.

Interrogate DME fault memory.

Note down fault messages stored in memory.

Further information on troubleshooting in line with DIS or MoDiC instructions.

Scheme 144

OBD Socket (1) In Driver's Footwell

Same procedure as above.

Scheme 145

13 31 ... Notes on fuel pressure check (reference pressure: environment)

Feature Of This Version With Ambient Pressure

The connection for the vacuum hose of the fuel pressure regulator is located between the throttle and the air cleaner or on the air cleaner.

Test Precondition

The correct fuel pressure regulator is fitted.

1. Using the EPC, check whether the fuel pressure regulator suitable for the car is fitted

Connect test adapter. Refer to 13 31 029 CHECKING FUEL PUMP DELIVERY PRESSURE (M54) .

Description Of Operation

The control function of the fuel pressure regulator must be guaranteed under all operating conditions. The fuel pump must always be able to generate a higher fuel pressure than the pressure regulated by the pressure regulator.

The injection rate is adjusted by means of the injection time; the injection time is controlled by the DME.

Description Of Operation: Fuel Return Line

When the engine is at a standstill and the ignition key is in position 0, the fuel return line after the pressure regulator is at zero pressure.

Description Of Operation: Pressure Retaining Function

The pressure regulator closes when the engine is at a standstill and the ignition key is in position 0. The fuel pressure in the delivery line is retained over an extended period. A non-return valve closes in the fuel pump. These measures help to retain the fuel pressure in the fuel system. Extended starting times are thus avoided.

Complaint: Drive Characteristic Faults, Lack Of Power

1. Run engine at idle speed and measure fuel pressure.

If The Measured Value Is Less Than The Nominal Value - 0.2 Bar

1. Line cross-sections in fuel feed are constricted or fuel filter is clogged, or
2. Fuel pump voltage supply is not O.K.: e.g. as a result of high contact resistance (corrosion) in plug connection between wiring harness and fuel pump.

If The Measured Value Is Greater Than The Nominal Value + 0.2 Bar

1. Turn off engine stop and then observe measured value.
2. If measured value drops to nominal value, then line cross-sections in fuel return are constricted or clogged.
3. Check the fuel lines for kinks. If no kinks are visible
4. Replace return lines.

If measured value remains too high, then pressure regulator is in all probability faulty.

1. Have a cleaning cloth ready and catch and dispose of escaping fuel.
2. Replace the return line but not the pressure regulator.

Complaint: Starting Problems

1. Run engine briefly at idle speed and switch off.
2. Note down measured value while engine is stopped.
3. Read off measured value again after approx. 20 to 30 minutes while engine is stopped.

Special tool 13 3 010 (hose clamp) is required for the following test.

If The Measured Value Has Dropped By More Than 0.5 Bar

1. Start engine and wait briefly for a stable pressure increase.
2. Switch off the engine and immediately pinch off the delivery line just before the pressure gauge with the special tool 13 3 010.
3. Note down measured value.
4. Read off measured value again after approx. 20 to 30 minutes while engine is stopped.

If The Measured Value Has Now Dropped By Less Than 0.5 Bar, The Following Faults Can Be Present

1. Fault in delivery lines.
2. Fault in in-tank delivery hose.
3. Faulty pressure-holding non-return valve in fuel pump.

Check components. Replace faulty components.

If The Measured Value Has Dropped By More Than 0.5 Bar Again

1. Replace pressure regulator.

Note. All the fuel hoses and hose clips which were detached within the framework of the checks must be replaced. Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Now clear the fault memory.

13 31 029 Checking fuel pump delivery pressure (M54)

Note. For Special Tool identification, see SPECIAL TOOLS - X5 (3.0i) .

Special Tools Required

1. 13 3 010
2. 13 5 220
3. 61 3 050

Switch off ignition.

Remove cover from fuel injectors.

Remove dust cap (1) from measuring valve on fuel rail.

Scheme 146

Prepare special took kit 13 5 220 (consisting of 13 5 221 and 13 5 222).

Scheme 147

Unscrew check valve (1) on special tool kit 13 5 220 .

Fit special tool kit 13 5 220 on measuring valve and tighten knurled nut until hand-tight.

Start engine.

Screw in check valve (1) until a pressure reading is indicated on DIS Tester.

Scheme 148

Measuring Fuel Pressure

1. Connect pressure sensor to DIS Tester.
2. Start engine.
3. Select Measurement.
4. Multimeter function appears.
5. Select Pressure test.
6. Read off fuel pressure.

Compare actual value of test pressure with specified value . Refer to FUEL SYSTEM - TECHNICAL DATA .

Switch off engine.

Checking Fuel Pump

Detach fuel pump relay . Refer to 13 63 590 REPLACING FUEL PUMP RELAY .

Note. Check whether fuel pump no longer starts up during engine starting procedure (engine fails to start).

Connect special tool 61 3 050 to terminal (87) and terminal (30).

Press button and read off fuel pump delivery pressure on DIS Tester.

Compare actual value with specified value of delivery pressure . Refer to FUEL SYSTEM - TECHNICAL DATA .

Scheme 149

Keep special tool 13 3 010 ready for further tests.

Further tests are described in the article FUEL PRESSURE CHECK. Refer to 13 31 ... NOTES ON FUEL PRESSURE CHECK (REFERENCE PRESSURE: ENVIRONMENT) .

Scheme 150

Note. Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.

13 32 051 Replacing fuel filter (M62, M54)

Note. For Special Tool identification, see SPECIAL TOOLS - X5 (3.0i) .

Special Tools Required

1. 13 3 010

Switch off ignition.

Recycling

The fuel in the fuel lines is under pressure (approx. 3 to 5 bar)!

Fuel emerges when the fuel lines are disconnected from the fuel filter.

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

Remove fuel pressure regulator. Refer to 13 51 630 REPLACING FUEL PRESSURE REGULATOR (M62, M54) .

Scheme 151

Seal fuel feed line before and after fuel filter with two special tools 13 3 010.

This prevents excessive discharge of fuel from the fuel lines.

Note. Mark fuel lines on fuel filter. This prevents the fuel lines from being installed incorrectly on the fuel filter.

Release clips (1).

Detach fuel lines (2) from fuel filter.

Scheme 152

Installation

Replace clips.

Release screws.

Remove fuel filter (1) from holders (2).

Scheme 153

13 41 500 Replacing idle speed control valve (M52TU, M54)

Necessary Preliminary Tasks

1. Switch off ignition.
2. Disconnect battery ground wire.
3. Observe instructions for disconnecting and connecting battery. Refer to «12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY»(/bmw/x5/e53-1999-2003/remont/gauges-instrument-panels/#engine-electrical-system-repair-instructions-x5-30l__12-00-instructions-for-disconnecting) .

M54 E46/E53 Only

Remove complete intake hose (between intake filter housing and throttle assembly). Refer to 13 54 250 REPLACING INTAKE HOSE (BETWEEN AIR-MASS FLOW SENSOR AND CONNECTING PIECE) (M54) and 13 54 251 REPLACING INTAKE HOSE (BETWEEN CONNECTING PIECE AND THROTTLE ASSEMBLY) (M54) .

M52TU And M54

Unfasten following plug connections

Scheme 154

1. Resonance flap.
2. Idle speed control valve.

Installation Location

Idle actuator (2) is fitted below intake air manifold, directly above throttle (1).

Scheme 155

Release screw (1) on cable duct mounting.

Release screws (2) on holder of idle actuator (3).

Remove idle actuator with holder from intake air manifold.

Scheme 156

Detach idle actuator (2) from rubber retainer (4).

Always replace gasket (1) from idle actuator (2) to intake air manifold. However, during reinstallation, do not fit gasket on idle actuator but install first in intake air manifold.

Scheme 157

Installation

Replace seal (1).

Coat gasket (1) on inside with antiseize agent.

Scheme 158

Note. Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.

13 51 630 Replacing fuel pressure regulator (M62, M54)

Follow instructions for fuel pressure testing. Refer to 13 31 ... NOTES ON FUEL PRESSURE CHECK (REFERENCE PRESSURE: ENVIRONMENT) .

Recycling

The fuel in the fuel lines is under pressure (approx. 3 to 5 bar)!

Fuel emerges from the fuel filter when the fuel pressure regulator is removed.

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

Removing Fuel Tank Underbody Protection On Left

Release metal screws (1).

Release screws (2).

Scheme 159

Release screws (1) on wheel arch trim, rear left.

Scheme 160

Bend wheel arch trim open.

Release screw (1).

Scheme 161

Release screws (1).

Scheme 162

Release screws (1) and (2).

Release nuts (3).

Scheme 163

Lower fuel tank underbody protection (1) only until access to fuel filter/pressure regulator is unhindered.

Scheme 164

Installation

Check routing of handbrake cable on tank.

If necessary, clip handbrake cable into holders on tank.

Note. Fuel pressure regulator is integrated in fuel filter.

Disconnect vacuum hose.

Pull out locking bracket (1) in direction of arrow.

Remove fuel pressure regulator (2).

Scheme 165

Installation

Replace O-rings on fuel pressure regulator (1).

To aid installation, apply a thin coat of petroleum jelly to O-rings (1).

Scheme 166

13 53 240 Replacing complete injection pipe (M54)

Necessary Preliminary Tasks

1. Switch off ignition.
2. Remove cover for fuel injectors.

Unclip plug connections (1) from holders and disconnect.

When replacing injection pipe

Remove both holders for plug connections (1) from injection pipe.

Disconnect plug connection of intake air temperature sensor (2).

Scheme 167

Disconnect plug connection (3) on solenoid valve of VANOS adjustment unit.

Detach terminal strip (4) for fuel injectors from injection pipe.

Recycling

Fuel in fuel lines is under pressure (approx. 3 - 5 bar). Fuel escapes when fuel lines are detached. Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

E53 And E46 Only

Remove heater bulkhead. Refer to 51 71 080 REMOVING AND INSTALLING/REPLACING HEATER BULKHEAD .

Z3, E85, E39, E46 And E53

Note. For a better overview, this work step is shown on an engine that has been removed.

Unclip fuel line (1) from holder (2).

Scheme 168

Follow instructions for unlocking fuel line. Refer to 13 53 540 REPLACING, SEALING FUEL HOSES .

Unlock fuel line (1) from cylinder head at rear.

Release screws (1) and remove injection pipe with fuel injectors.

Scheme 169

Installation

Coat sealing rings of fuel injectors with anti-seize agent to facilitate fitting of injection pipe.

13 53 540 Replacing, sealing fuel hoses

Recycling

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

Version With Hose Clamps

Release hose clamps.

Remove hoses (1) and (2).

Scheme 170

Installation

Fuel hoses and hose clamps must be replaced each time they are removed!

Version With Compressed Air Connection

Blow fuel back into tank with a short blast of compressed air (max. 3 bar) at compressed air connection (1).

Scheme 171

Version, Fuel Hoses Without Integrated Unlocking Facility

Unlock fuel hoses with special tool 16 1 050 and detach hoses.

Scheme 172

Installation

Check O-ring in fuel hose and sealing surfaces on fuel lines for damage; replace components if necessary.

Coat O-ring for assembly with anti-friction agent.

Version, Fuel Hoses With Integrated Unlocking Facility

Press fuel hose (1) downwards and keep pressed.

Scheme 173

Press unlocking ring (2) upwards, keep pressed and detach fuel hose (1).

Scheme 174

Installation

Check O-ring in fuel hose and sealing surfaces on fuel lines for damage; replace components if necessary.

Coat O-ring for assembly with anti-friction agent.

Seal Off Fuel Hoses

Fuel hoses with hose clamps

Seal hoses with special tool 13 3 010.

Scheme 175

Installation

Fuel hoses and hose clamps must be replaced each time they are removed!

Fuel Hoses With Quick-Release Couplings

Seal fuel hoses (1) with special tool 13 5 281.

Seal fuel lines (2) with special tool 13 5 282.

Scheme 176

Installation

Check O-ring in fuel hose and sealing surfaces on fuel lines for damage; replace components if necessary.

Coat O-ring for assembly with anti-friction agent.

13 54 030 Removing and installing/sealing throttle assembly (M54)

Turn off ignition.

Observe instructions for disconnecting and connecting battery. Refer to 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .

Disconnect battery negative lead from battery and lay to one side.

Remove intake filter housing. Refer to 13 71 000 REMOVING AND INSTALLING INTAKE FILTER HOUSING (M54) .

Remove intake hose completely (between intake filter housing and throttle assembly). Refer to 13 54 250 REPLACING INTAKE HOSE (BETWEEN AIR-MASS FLOW SENSOR AND CONNECTING PIECE) (M54) and 13 54 251 REPLACING INTAKE HOSE (BETWEEN CONNECTING PIECE AND THROTTLE ASSEMBLY) (M54) .

Disconnect following plug connections

Scheme 177

1. Resonance flap
2. Idle-speed control valve.

Disconnect following plug connections

Scheme 178

1. Oil pressure switch.
2. Oil temperature switch. NOTE: For purposes of clarity, the power steering pump supply tank is not shown.

Unlock plug (1) and detach from tank venting valve.

Scheme 179

Release screws (1) on cable duct mounting.

Scheme 180

All Cars

Unlock plug (1) and detach from throttle assembly (3).

Release screws (2) and remove throttle assembly (3).

Scheme 181

Installation

Replace sealing ring (1) between throttle assembly and intake manifold.

Scheme 182

Note. A faulty throttle adjusts the adaptation values stored in the DME control unit. These adaptation values must be reset after the throttle assembly has been replaced.

Clearing Adaptation Values

1. Connect DIS Tester.
2. Select vehicle type.
3. Select "DME Motor Electronics MS43", carry out individual brief test.
4. Continue with bottom right arrow.
5. The "Fault pattern selection" window appears. Select "Function selection" (bottom left).
6. The "Function and component selection" window appears: Select "Service functions". Select "Drive". Select "Digital Motor Electronics". Select "Reset adaptations". Select "Test schedule" (bottom left).
7. The "Test schedule" window appears. Select "Reset adaptations".
8. Continue with bottom right arrow: For subsequent procedure, follow DIS instructions. The new adaptation values are stored in the DME control unit after the engine is started for the first time.

13 54 250 Replacing intake hose (between air-mass flow sensor and connecting piece) (M54)

Switch off ignition.

Release hose clamp (3).

Detach intake hose (5) from air-mass flow sensor.

Scheme 183

Installation

Check sealing ring (1) between air-mass flow sensor and intake hose for damage, replace if necessary.

Coat sealing ring (1) with acid-free grease.

Scheme 184

Detach cable tie (2) of line (1) on intake hose (3).

Scheme 185

Release clips (1).

Pull intake hose (2) out of connecting piece and remove.

Scheme 186

13 54 251 Replacing intake hose (between connecting piece and throttle assembly) (M54)

Switch off ignition.

E53 Only

Detach vacuum lines (1 and 2) from intake hose (3).

Scheme 187

Z3, E39 And E53

Release clips (1).

Pull intake hose (2) out of connecting piece.

Scheme 188

Release screw.

Remove suction jet pump (1) from intake air manifold.

Scheme 189

Release hose clamps (1).

Detach intake hose from throttle assembly and idle speed control valve.

Scheme 190

13 62 511 Replacing intake air temperature sensor (M52TU, M54)

Turn off ignition.

Remove cover from fuel injectors.

Disconnect plug connection (1) for temperature sensor.

Scheme 191

Press catch and withdraw temperature sensor (1) from intake air manifold.

Scheme 192

Installation

Check sealing ring on temperature sensor for damage, replace if necessary.

Coat sealing ring with antiseize agent.

Note. Read out fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.

13 62 531 Replacing coolant temperature sensor (M52TU, M54)

Turn off ignition.

Installation Location

Coolant temperature sensor (1) is fitted below intake air manifold in cylinder head of cylinder 6.

Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (M54) .

Scheme 193

Disconnect plug connection (1).

Unscrew temperature sensor.

Installation

Tightening torque, (13 N.m.).

Check coolant level, top up coolant if necessary.

Scheme 194

Note. Read out fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.

13 62 560 Removing and installing/replacing airmass flow sensor (M54)

Interrogate fault memory of DME control unit.

Switch off ignition.

Unlock plug (1) and detach.

Open retainers (2).

Release hose clamp (3) and detach intake hose (5) from airmass flow sensor (4).

Pull air-mass flow sensor (4) out of intake filter housing.

Scheme 195

Installation

Check sealing ring (1) between air-mass flow sensor and intake hose for damage, replace if necessary.

Coat sealing ring (1) with acid-free grease.

Scheme 196

Installation

Check sealing ring (1) between air-mass flow sensor and intake filter housing for damage, replace if necessary.

Coat sealing ring (1) with acid-free grease.

Scheme 197

Installation

Arrow on air-mass flow sensor indicates direction of air flow.

Install air-mass flow sensor between intake filter housing and intake hose so that arrow points in direction of intake hose.

Scheme 198

Note. Interrogate fault memory of DME control module. Check stored fault messages. Rectify faults. Then clear fault memory.

13 63 590 Replacing fuel pump relay

Interrogate fault memory of DME control unit.

Switch off ignition.

Remove right glovebox. Refer to 51 16 360 REMOVING AND INSTALLING RIGHT GLOVE BOX .

Release screws (1).

Remove fuse box (2) towards bottom (do not disconnect electrical connections).

Scheme 199

Detach fuel pump relay (1).

After removal of fuel pump relay and during engine starting sequence

1. The fuel pump no longer starts up
2. The engine does not start.

Scheme 200

Note. Interrogate fault memory of DME control module. Check stored fault messages. Rectify faults. Then clear fault memory.

13 64 541 Replacing all fuel injectors

Necessary Preliminary Tasks

1. Switch off ignition.
2. Remove complete injection pipe. Refer to «13 53 240 REPLACING COMPLETE INJECTION PIPE (M54)»(/bmw/x5/e53-1999-2003/remont/fuel-system/#fuel-system-repair-instructions-x5-30l__13-53-240-replacing-complete-injection) .

Scheme 201

Unclip retainers (1).

Withdraw fuel injectors (2) from injection pipe.

Replace fuel injectors.

Scheme 202

Installation

Coat sealing rings with anti-friction rubber coating (e.g. petroleum jelly).

13 71 000 Removing and installing intake filter housing (M54)

Turn off ignition.

Remove air-mass sensor. Refer to 13 62 560 REMOVING AND INSTALLING/REPLACING AIR-MASS FLOW SENSOR (M54) .

Release screws.

Raise intake filter housing (1) a little.

Pull intake pipe (2) out of intake hood (3).

Scheme 203

13 72 001 Replacing air cleaner element (M54)

E53 Only

Open clips (1).

Lift top section (2) of intake filter housing.

Scheme 204

E53, E46 And E85

Remove air cleaner element.

Scheme 205

Installation

Clean top and bottom sections of intake filter housing from inside.

Install new air cleaner element.

Check seal between air-mass flow sensor and air cleaner top section for damage, replace if necessary.

Coat seal with antiseize agent to facilitate joining of air cleaner and throttle body.

13 90 500 Replacing tank venting valve (M52TU, M54)

Turn off ignition.

Location

Tank venting valve (2) is fitted at front below intake air manifold (1).

E53/M54 Only

Remove intake hose. Refer to 13 54 250 REPLACING INTAKE HOSE (BETWEEN AIR-MASS FLOW SENSOR AND CONNECTING PIECE) (M54) .

Scheme 206

Z3, E39, E46 And E53

Disconnect plug connection (1).

Release vent hose (2). To do so, press locking bar and detach vent hose.

Scheme 207

Detach hose (1) from tank venting valve (2).

Note. Illustration shows removed supply tank for power steering.

Scheme 208

Note. Interrogate fault memory of DME control module. Check stored fault messages. Rectify faults. Then clear fault memory.

See also:
• FUEL SYSTEM - TECHNICAL DATA
• 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY
• 51 71 080 REMOVING AND INSTALLING/REPLACING HEATER BULKHEAD
• 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (M54)
• 51 16 360 REMOVING AND INSTALLING RIGHT GLOVE BOX
• 13 31 029 CHECKING FUEL PUMP DELIVERY PRESSURE (M54)
• 13 63 590 REPLACING FUEL PUMP RELAY
• 13 31 ... NOTES ON FUEL PRESSURE CHECK (REFERENCE PRESSURE: ENVIRONMENT)
• 13 51 630 REPLACING FUEL PRESSURE REGULATOR (M62, M54)
• 13 54 250 REPLACING INTAKE HOSE (BETWEEN AIR-MASS FLOW SENSOR AND CONNECTING PIECE) (M54)
• 13 54 251 REPLACING INTAKE HOSE (BETWEEN CONNECTING PIECE AND THROTTLE ASSEMBLY) (M54)
• 13 53 540 REPLACING, SEALING FUEL HOSES
• 13 71 000 REMOVING AND INSTALLING INTAKE FILTER HOUSING (M54)
• 13 53 240 REPLACING COMPLETE INJECTION PIPE (M54)
• 13 62 560 REMOVING AND INSTALLING/REPLACING AIR-MASS FLOW SENSOR (M54)