Engine Electrical System - Repair BMW M5 E60/E61

12 00... Instructions for disconnecting and connecting battery

Observe safety instructions for handling vehicle battery.

Before disconnecting battery

Turn off the ignition and other electrical loads/consumers to prevent sparking when reconnecting.

Note. If the ignition is not turned off when the battery is disconnected, fault memories may be set in some control units.

General notes on disconnecting battery

1. Do not disconnect battery leads and leads from alternator and starter motor while engine is running.
2. Cars with IBS on battery negative terminal: Do not under any circumstances pull/lever off pole shoes by force. Do not under any circumstances release socket-head cap screw of IBS.
3. Detach terminal of «battery negative lead»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-00-instructions-for-disconnecting-and) from car battery and second battery if fitted. Cover battery negative terminal(s) and secure.
4. When work is carried out on the electrical system, faults may be caused in the fault memories of some control units when the battery is connected.
5. When installing battery terminal, tighten to specified torque.

After connecting battery

Vehicles with a two-battery system

Starter and equipment batteries

A two-battery system has a starter battery circuit and an equipment battery circuit. A secondary control unit monitors both battery circuits. Depending on the situation, the battery circuits are connected to or isolated from the secondary control unit via an isolating relay.

Two AGM batteries, whose design and properties are described in AGM batteries, are used as a storage battery.

Receiving/giving starting assistance via jump start terminal

The engine can be jump-started with an external voltage supply via the jump start terminal on the right side of the engine compartment.

Note. The starter battery is isolated from the alternators when the engine hood/bonnet is open.

Giving starting assistance via the jump start terminal is thus limited by the capacity of the starter battery when the engine hood/bonnet is open.

Charging starter and equipment batteries via jump start terminal

The starter battery is charged as a matter of priority with a charger connected to the jump start terminal. The voltage at the starter battery is the decisive factor in determining whether the equipment battery is also included in the charging operation. The secondary control unit automatically detects a charging operation at a charging voltage at the starter battery of > or = 13.5 V. The isolating relay is closed and thus the equipment battery is connected in parallel. Both batteries are now charged.

Prerequisite

1. Terminal 61 inactive
2. Terminal 15 inactive

If terminal 15 becomes "active" during the charging operation, the isolating relay is opened immediately and again only the starter battery is charged.

Note. When the engine hood is open, the isolating relay is also opened in normal operation when the engine is running. A special mode can be set by means of diagnosis for workshop/garage operation. The isolating relay is closed from terminal R in this operating mode. This mode is automatically reset once a distance of 5 km has been driven.

Trickle charging

The increased closed-circuit current consumption can be compensated for via the jump-start connection point with the aid of the "Acctiva easy" battery trickle charger.

12 00 Instructions for removal and replacement of control units

When replacing the DME/DDE control unit, observe the following

1. In each case read out the hardware/software status of the relevant control unit using the BMW diagnosis system. Comply with the instructions of the DIS diagnosis system on the steps pertaining to coding and programming. On vehicles with electronic vehicle immobilization, comply with the instructions of the BMW diagnosis system.
2. Each control unit is programmed with certain basic values, which serve as mean values. The control unit receives different input values, depending on engine condition, which are compared with the stored values. The adaptive system compares the input values with the stored map values. The control commands are routed to the relevant actuators.
3. If the DME control unit is without current for a long time (more than one hour), its adaptive system loses the stored values. When a cleared control unit is restarted or a new control unit is installed, the adaptive system must read in and store the input values of the associated engine as new basic values itself.
4. This procedure could lead to erratic idling and disturbed overrunning of the engine after starting. Depending on the engine it could require some time before all values are adapted to the engine condition.
5. Therefore observe the following procedure before replacing or reinstalling a DME/DDE control unit: If possible, bring the engine up to its operating temperature prior to replacement of the control unit. Change control units and drive the vehicle with changing engine speeds.

12 00...Instructions for working on the ignition system

High tension! - High tension!

1. Ignition lead
2. spark-plug connectors
3. spark plugs
4. Ignition coil (high voltage at terminal 4 is approx. 40 kV)
5. Lead of terminal 1 from ignition coil to DME control unit (high voltage approx. 350 V)

12 00...Notes for disconnecting and connecting battery

See NOTES FOR DISCONNECTING AND CONNECTING BATTERY .

12 00...Notes/information on start assistance (jump starting)

Do not start the engine with help of starting sprays.

Preparation

Conform with the following when starting the engine with a jump starting cable.

1. Ensure that the jump starting cable wires are of appropriate cross-section size.
2. Only use fuse-protected jump starting cables.
3. Check whether the current-supplying battery has 12 V voltage.
4. If the engine is started from the battery of another vehicle, ensure that there is no contact between the bodies of both vehicles.

If the battery in the vehicle supplying power is weak, start the engine of this vehicle and let it run at idling speed.

Operation

It is essential to conform to the procedures so as to avoid injury to persons or damage to parts.

1. Automatic transmission: select drive position "P", apply parking brake.
2. Manual transmission: move gear lever to neutral position, apply parking brake.
3. Ensure that the jump leads cannot get caught in rotating parts, e.g. fan.
4. First connect both positive poles of the batteries with one jump starting cable (red).
5. Use the battery positive terminal in the engine compartment for vehicles with the battery in the luggage compartment.
6. Then use the second jump starting cable (black) to connect the negative post of the current-supplying battery with the earth/ground point (not the negative pole or the body) of the vehicle to be started.

Risk of explosion!

After the engine of the vehicle to be started has fired, first disconnect the jump starting cable between the negative pole and the earth/ground point. Then remove the starting cable from the positive poles.

12 12 011 REPLACING ALL SPARK PLUGS (S85)

Special tools required

1. 12 1 171

Necessary preliminary tasks

1. Switch off ignition.
2. Remove all «ignition coils»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-13-512-replacing-all-ignition) .

Clean spark plug slot with compressed air.

1. Remove dirt contamination from the spark plug shaft. The plug shaft must be cleaned with compressed air after the ignition coils have been removed but before the spark plugs have been dismounted. After removing the spark plugs, check the sealing surface again for dirt contamination and if necessary, clean with a damp cloth or again with compressed air. NOTE: Deposits that are not removed according to instructions may enter the combustion chamber and lead to uncontrolled combustion. Remaining deposits in the area of the spark plug seal can lead to leaks and to the spark plugs coming loose during engine operation.
2. Do not grease/oil thread or use any graphite or copper grease. Adhere to the torque values of the packaging information or regulation. NOTE: If these instructions are not followed, especially with regard to greasing, this may result in mechanical damage to the spark plug housing/thread. Spark plugs that are not tightened sufficiently lead to leaks and to the spark plugs coming loose during engine operation.

Unscrew spark plugs with special tool 12 1 171.

Flexible ratchet extensions must always be used. If rigid mounting tools are used, there is a risk of insulator breakages.

Note. Also do not use a variable plug connection with locking capability as this also poses a risk of insulator breakages.

Installation

Do not let spark plugs fall into the spark plug shaft. This can lead to a reduction of the electrode gap and so impair the smooth running of the engine, especially in idle mode.

First, hand-tighten the spark plugs with special tool 12 1 171 and with an extension with a joint into the engine.

Then tighten the spark plugs using a torque wrench, special tool 12 1 171 and an extension with a joint. Observe tightening torque.

Tightening torque 12 12 2AZ. See ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Scheme 57

12 13 512 REPLACING ALL IGNITION COILS (S85)

Necessary preliminary tasks

1. Read out fault memory of DME control unit.
2. Switch off ignition.
3. Remove left and right intake filter housing upper sections. See «13 72 002 REPLACING BOTH AIR CLEANER INSERTS (S85)»(/bmw/m5/e60e61-2004-2010/remont/fuel-system/#fuel-system-repair__13-72-002-replacing-both-air) .
4. Release coolant expansion tank and place to one side.
5. Remove ignition coil cover on left and right.

Unlock plug fastener (1) of ignition coil.

Scheme 58

Pull off plug (1).

Pull ignition coil (2) up and out.

This procedure is applicable to all ignition coils.

Scheme 59

Installation

Insert rubber seal on ignition coils (1) between guides.

Scheme 60

Note. Check stored fault messages. Now clear the fault memory.

12 14 521 REPLACING CRANKSHAFT PULSE GENERATOR (S85)

Necessary preliminary tasks

1. Read out fault memory of DME control unit; if necessary, work through test schedules
2. Switch off ignition
3. If necessary, remove underbody protection.

Installation location

On transmission housing at bottom right.

Unlock plug (1) and remove.

Release screw.

Tightening torque, see 12 14 1AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Withdraw pulse generator (2) from transmission housing.

Installation

Replace sealing ring.

Replace screw.

Scheme 61

Installation

Now clear the fault memory.

12 14 550 REPLACING CONTROL UNIT (DME)

Necessary preliminary tasks

1. Read fault memory.
2. Switch off ignition.
3. Disconnect «battery negative lead»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-00-instructions-for-disconnecting-and) .
4. Remove lower section of microfilter housing on right. See «64 31 061 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER HOUSING LOWER SECTION (5-SERIES)»(ref-379401-S13162676242010121300000) or «64 31 061 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER HOUSING LOWER SECTION (6-SERIES)»(ref-202140-S32898856862005102700000) .

Replacement

1. Carry out programming/coding.

Unlock stopper (1) in direction of arrow.

Unfasten screws.

Lift out cover (2).

Scheme 62

Unlock and detach plug connections on DME control unit (1).

Unlock DME control unit (2) and remove towards top.

Scheme 63

12 14 700 CODING CONTROL MODULE (DME / DDE)

Switch off ignition.

Connect MoDiC or DIS/GT1 Tester.

Switch on ignition.

Select "Coding" program.

For subsequent procedure, follow instructions in MoDiC or DIS/GT1 Tester.

Carry out adjustment of following control units

1. EWS (electronic immobilizer)
2. DME (Digital Motor Electronics) or
3. DDE (Digital Diesel Electronics)

12 14 705 PROGRAMMING CONTROL UNIT (DME / DDE)

Switch off ignition.

Connect MoDiC or DIS/GT1 Tester.

Switch on ignition.

Select "Programming".

For subsequent procedure, follow instructions in MoDiC or DIS/GT1 Tester.

Carry out adjustment of following control units

1. EWS (electronic immobilizer)
2. DME (Digital Motor Electronics) or
3. DDE (Digital Diesel Electronics)

12 90... REMOVING AND INSTALLING/REPLACING ELECTRONICS BOX

Note. Follow instructions for removing and installing electronic control units .

Necessary preliminary tasks

1. Read fault memory.
2. Disconnect «battery negative lead»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-00-instructions-for-disconnecting-and) .
3. Remove electronics box fan.
4. Remove «DISTRIBUTION BOX (PASSENGER COMPARTMENT)»(ref-202137-S25054576712006031500000) .
5. Release control unit holder; if necessary, release CD changer.

Release screws (arrows) behind sound insulation.

Disconnect wiring harness on engine compartment side on right.

Remove electronics box.

Scheme 64

Installation

Make sure gasket (1) is correctly seated on electronics box.

Read fault memory.

Scheme 65

13 62 601 REPLACING PULSE GENERATOR ON LEFT INLET CAMSHAFT (S85)

(cylinder bank 6 to 10)

Necessary preliminary tasks

1. Read out fault memory of DME control unit; if necessary, work through test schedules.
2. Switch off ignition.
3. Remove left intake filter housing. See «13 71 000 REMOVING AND INSTALLING LEFT INTAKE FILTER HOUSING (S85)»(/bmw/m5/e60e61-2004-2010/remont/fuel-system/#fuel-system-repair__13-71-000-removing-and-installing) .
4. Remove left ignition coil cover.

Release plug connector (1) and pull off.

Release screw.

Remove pulse generator (2).

Installation

Replace sealing ring and coat with antiseize agent.

Scheme 66

Note. Now clear the fault memory.

13 62 602 REPLACING PULSE GENERATOR ON RIGHT INLET CAMSHAFT (S85)

(cylinder bank 1 to 6)

Necessary preliminary tasks

1. Read out fault memory of DME control unit; if necessary, work through test schedules.
2. Switch off ignition.
3. Remove right intake filter housing. See «13 71 020 REMOVING AND INSTALLING RIGHT INTAKE FILTER HOUSING (S85)»(/bmw/m5/e60e61-2004-2010/remont/fuel-system/#fuel-system-repair__13-71-020-removing-and-installing) .
4. Remove right ignition coil cover.

Release plug connector (1) and pull off.

Release screw.

Remove pulse generator (2).

Installation

Replace sealing ring and coat with antiseize agent.

Scheme 67

Note. Now clear the fault memory.

13 62 604 REPLACING PULSE GENERATOR ON LEFT EXHAUST CAMSHAFT (S85)

(cylinder bank 6 to 10)

Necessary preliminary tasks

1. Read out fault memory of DME control unit; if necessary, work through test schedules.
2. Switch off ignition.
3. Remove left intake filter housing. See «13 71 000 REMOVING AND INSTALLING LEFT INTAKE FILTER HOUSING (S85)»(/bmw/m5/e60e61-2004-2010/remont/fuel-system/#fuel-system-repair__13-71-000-removing-and-installing) .
4. Remove left ignition coil cover.

Release plug connector (1) and pull off.

Release screw.

Remove pulse generator (2).

Installation

Replace sealing ring and coat with antiseize agent.

Scheme 68

Note. Now clear the fault memory.

13 62 605 REPLACING PULSE GENERATOR ON RIGHT EXHAUST CAMSHAFT (S85)

(cylinder bank 1 to 6)

Necessary preliminary tasks

1. Read out fault memory of DME control unit; if necessary, work through test schedules.
2. Switch off ignition.
3. Remove right intake filter housing. See «13 71 020 REMOVING AND INSTALLING RIGHT INTAKE FILTER HOUSING (S85)»(/bmw/m5/e60e61-2004-2010/remont/fuel-system/#fuel-system-repair__13-71-020-removing-and-installing) .
4. Remove right ignition coil cover.

Release plug connector (1) and pull off.

Release screw.

Remove pulse generator (2).

Installation

Replace sealing ring and coat with antiseize agent.

Scheme 69

Note. Now clear the fault memory.

13 62 660 REPLACING LEFT OR RIGHT IONIC CURRENT CONTROL UNIT (S85)

Necessary preliminary tasks

1. Read out fault memory of DME control unit; if necessary, work through test schedules.
2. Switch off ignition.
3. Remove intake filter housing. See «13 71 000 REMOVING AND INSTALLING LEFT INTAKE FILTER HOUSING (S85)»(/bmw/m5/e60e61-2004-2010/remont/fuel-system/#fuel-system-repair__13-71-000-removing-and-installing) or «13 71 020 REMOVING AND INSTALLING RIGHT INTAKE FILTER HOUSING (S85)»(/bmw/m5/e60e61-2004-2010/remont/fuel-system/#fuel-system-repair__13-71-020-removing-and-installing) .

Note. Illustration shows and description refers to the left ionic current control unit. The procedure is identical for the right ionic current control unit.

Unfasten screws.

Remove cover (1).

Scheme 70

Release plug connector (1) and pull off.

Unfasten screws.

Remove ionic current control unit (2).

Scheme 71

Note. Now clear the fault memory.

12 31... REPLACING ALTERNATOR BELT PULLEY

Special tools required

1. 12 7 110

Remove and install alternator drive belt.

Depending on alternator type, grip shaft with

1. hexagon socket
2. multi-tooth socket or
3. Torx socket wrench

Release nut with special tool 12 7 110.

Installation

Tightening torque. See ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Scheme 72

12 31... REPLACING ALTERNATOR BELT PULLEY (WITH OVERRUNNING CLUTCH)

Remove and install alternator drive belt. Grip alternator shaft with: - internal serration

Release nut with special tools 12 7 120. Installation: Tightening torque, see 12 31 3AZ in 11 31 CAMSHAFT .

Scheme 73

12 31 009 CHECKING ALTERNATOR (BSD)

Necessary preliminary tasks

1. Correct connections on charged battery.
2. Correct connections on alternator and starter motor.
3. Good ground connection between engine and body.
4. Tensioned ribbed V-belt.
5. Read out DME/DDE fault memory.

Note. The alternator with BSD interface can communicate with the engine control unit (DME/DDE). The alternator is not connected to the charge telltale light. The alternator can identify various faults.

BSD alternator can be recognized by the plug connection on the alternator.

Connect diagnosis tester.

1. Function selection
2. Complete vehicle
3. Drive
4. Voltage and current regulation
5. Voltage and current generation
6. Alternator
7. Follow instruction in diagnostic program

Oscillogram for a fault-free alternator

Scheme 74

Oscillogram for a faulty alternator

One phase interrupted.

Repair/exchange alternator.

Scheme 75

Interturn fault.

Repair/exchange alternator.

Scheme 76

Open circuit in negative diode.

Repair/exchange alternator.

Scheme 77

Short circuit in positive diode.

Repair/exchange alternator.

Scheme 78

Open circuit in positive diode.

Repair/exchange alternator.

Scheme 79

Open circuit in exciter diode.

Repair/exchange alternator.

Scheme 80

Assemble engine.

Check function of DME/DDE.

12 31 020 REMOVING AND INSTALLING OR REPLACING ALTERNATOR (S85)

Necessary preliminary tasks

1. Switch off ignition
2. Follow instructions for disconnecting and connecting battery.
3. Disconnect «battery negative lead»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-00-instructions-for-disconnecting-and) and cover.
4. Remove «RADIATOR»(/bmw/m5/e60e61-2004-2010/remont/cooling-system-mechanical/#cooling-system-repair__17-11-000-removing-and-installing) .
5. Remove alternator drive belt. See «11 28 010 REPLACING ALTERNATOR DRIVE BELT (S85)»(/bmw/m5/e60e61-2004-2010/remont/mechanical/#engine-repair__11-28-010-replacing-alternator-drive) .

Unfasten screws.

Carefully press leads (1) to one side.

Scheme 81

Unfasten screws.

Pull alternator (1) forwards until connections are accessible.

Scheme 82

Unlock plug (1) and remove.

Release nut (2), remove battery positive lead from alternator.

Tightening torque. See ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Remove alternator (3).

Scheme 83

12 32 501 Replacing voltage regulator

Necessary preliminary tasks

1. Switch off ignition.
2. Disconnect «battery negative lead»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-00-instructions-for-disconnecting-and) .
3. Notes on instructions for «removing and installing electronic control units»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-00-instructions-for-removal-and) .
4. Remove «alternator»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-31-020-removing-and-installing) .

Bosch

Release protective caps (1).

Scheme 84

Bosch

Release screw (1) and nuts (2), remove cover.

Scheme 85

Bosch

Release screws and remove regulator switch (1) in direction of arrow.

Scheme 86

Bosch

Installation

Clean contact surfaces and check pretension of contact spring, replace regulator switch if necessary.

Measurement A = min. 5 mm.

Check collector ring for wear and recondition if necessary.

Scheme 87

Valeo

Slacken nut (1).

Slacken nut (2).

Release screws (3).

Release cover (4).

Scheme 88

Valeo

Release screws.

Remove regulator switch (1) towards top.

Scheme 89

Valeo

Installation

Clean contact surfaces and check pretension of contact spring, replace regulator switch if necessary.

Measurement A = min. 5 mm.

Check collector ring for wear and recondition if necessary.

Scheme 90

Installation

Fit new regulator (1) with attached mounting sleeve (2) or locked carbon brush.

Pull off mounting sleeve (2) and replace with cover (3).

Scheme 91

12 41 020 REMOVING AND INSTALLING/REPLACING STARTER MOTOR (S85)

Necessary preliminary tasks

1. Switch off ignition
2. Disconnect «battery negative lead»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-00-instructions-for-disconnecting-and) and cover.
3. Remove reinforcement plate. See «31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE (6-SERIES)»(ref-263479-S39582832342007090700000) or «31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE (5-SERIES)»(/bmw/m5/e60e61-2004-2010/remont/axle-shafts/#front-axle-repair__31-10-010-removing-and-installingreplacing) .
4. Remove rear underbody protection.
5. Remove propeller shaft. See «26 11 000 REMOVING AND INSTALLING COMPLETE PROPELLER SHAFT (CONSTANT-VELOCITY JOINT) (5-SERIES)»(/bmw/m5/e60e61-2004-2010/remont/driveshaft-universal-joints/#propeller-shaft-repair__26-11-000-removing-and-installing) «26 11 000 REMOVING AND INSTALLING COMPLETE PROPELLER SHAFT (CONSTANT-VELOCITY JOINT) (6-SERIES)»(ref-263498-S01797201662007090700000) .
6. Remove intake air manifold. See «11 61 050 REMOVING AND INSTALLING AIR INTAKE MANIFOLD (S85)»(/bmw/m5/e60e61-2004-2010/remont/mechanical/#engine-repair__11-61-050-removing-and-installing) .
7. Remove right idle speed actuator. See «13 41 555 REPLACING BOTH IDLE SPEED ACTUATORS (S85)»(/bmw/m5/e60e61-2004-2010/remont/fuel-system/#fuel-system-repair__13-41-555-replacing-both-idle) .

Unlock plug (1) and remove.

Unfasten nut.

Tightening torque. See ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Remove battery positive lead (2).

Scheme 92

Release screw (1).

Unfasten screws (2).

Tightening torque. See ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Pull starter motor out of transmission mount and remove.

Scheme 93

Installation

Check starter pinion and ring gear for damage, replace damaged parts if necessary.

12 41 041 REPLACING SOLENOID SWITCH

Turn off ignition.

Remove starter motor .

Release nut (1).

Remove cable lug (2).

Scheme 94

Release screws (1).

Scheme 95

Remove solenoid switch (1) and spring (2). Unhook pin (3).

Installation

Check pin (3) for wear and apply grease.

Scheme 96

12 51 001 REPLACING WIRING HARNESS SECTION FOR ENGINE (S85)

Necessary preliminary tasks

1. Read out fault memory of control unit of Digital Motor Electronics (DME).
2. Check stored fault messages.
3. Switch off ignition.
4. Disconnect battery.
5. Remove intake air manifold. See «11 61 050 REMOVING AND INSTALLING AIR INTAKE MANIFOLD (S85)»(/bmw/m5/e60e61-2004-2010/remont/mechanical/#engine-repair__11-61-050-removing-and-installing) .
6. Remove cover for ionic current control unit on left and right.
7. Remove ignition coil cover on left and right.
8. Unlock all plug connections in electronics box and disconnect.

Release bolt on cable duct (1).

Scheme 97

Release bolt on cable duct (1).

Scheme 98

WORK STEP CHART

Release bracket on underside of transmission.

Lay cable, plugs of oxygen sensors, temperature sensor and crankshaft sensor over bracket of right catalytic converter.

Feed out cable towards top.

Remove wiring harness.

Installation

Pay attention to cable routing/mounting points.

Now clear the fault memory.

12 61 285 REPLACING ENGINE OIL LEVEL SENSOR (S85)

Necessary preliminary tasks

1. Switch off ignition.
2. Remove reinforcement plate. See «31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE (6-SERIES)»(ref-263479-S39582832342007090700000) or «31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE (5-SERIES)»(/bmw/m5/e60e61-2004-2010/remont/axle-shafts/#front-axle-repair__31-10-010-removing-and-installingreplacing) .
3. Drain off engine oil.

Unlock plug (1) and remove.

Unscrew nuts.

Tightening torque. See ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Remove oil level sensor (2).

Installation

Clean sealing face on oil sump.

Replace seal on oil level sensor.

An excessively low torque value will result in oil leaks.

An excessively high torque value will result in damage to the oil level sensor.

Top up engine oil.

Scheme 99

Note. Follow instructions for removing and installing electronic control units .

Necessary preliminary tasks

1. Read fault memory.
2. Disconnect «battery negative lead»(/bmw/m5/e60e61-2004-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair__12-00-instructions-for-disconnecting-and) .
3. Remove electronics box fan.
4. Remove distribution box (passenger compartment). See «61 13 040 REPLACING DISTRIBUTION BOX (PASSENGER COMPARTMENT (5-SERIES)»(/bmw/m5/e60e61-2004-2010/remont/horns/#general-electrical-system-repair__61-13-040-replacing-distribution-box) or «61 13 040 REPLACING DISTRIBUTION BOX (PASSENGER COMPARTMENT) (6-SERIES).»(ref-202137-S25054576712006031500000)
5. Release control unit holder; if necessary, release CD changer.

Release screws (arrows) behind sound insulation.

Disconnect wiring harness on engine compartment side on right.

Remove electronics box.

Installation

Make sure gasket (1) is correctly seated on electronics box.

Read fault memory.

See also:
• NOTES FOR DISCONNECTING AND CONNECTING BATTERY
• ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES
• 13 72 002 REPLACING BOTH AIR CLEANER INSERTS (S85)
• 13 71 000 REMOVING AND INSTALLING LEFT INTAKE FILTER HOUSING (S85)
• 13 71 020 REMOVING AND INSTALLING RIGHT INTAKE FILTER HOUSING (S85)
• 11 31 CAMSHAFT
• RADIATOR
• 11 28 010 REPLACING ALTERNATOR DRIVE BELT (S85)
• 31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE (5-SERIES)
• 26 11 000 REMOVING AND INSTALLING COMPLETE PROPELLER SHAFT (CONSTANT-VELOCITY JOINT) (5-SERIES)
• 11 61 050 REMOVING AND INSTALLING AIR INTAKE MANIFOLD (S85)
• 13 41 555 REPLACING BOTH IDLE SPEED ACTUATORS (S85)
• 61 13 040 REPLACING DISTRIBUTION BOX (PASSENGER COMPARTMENT (5-SERIES)
• battery negative lead
• ignition coils
• electronic control units
• alternator
• starter motor