BMW X5: Removing/Replacing Knock Sensors (N52, N52K, N51)
IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released.
The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Switch off ignition
- Disconnect battery negative lead.
- Remove intake air manifold.
IMPORTANT: Mixing up the knock sensor plug connections will result in engine damage! Routing of wires and plug connections must conform to the original routing.
This eliminates the risk of confusion and mix-ups.
Release screws on both knock sensors. Remove knock sensors (1).
Installation:
Replace aluminum screws.
Tightening torque 12 14 1AZ.
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Fig. 29: Identifying Knock Sensors
Installation:
Clean support face of knock sensors on engine block.
NOTE: Check stored fault messages.
Now clear the fault memory.
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:
- EWS (electronic immobilizer)
- DME (Digital Motor Electronics) or
- DDE (Digital Diesel Electronics)
Refer to "Diagnosis and Coding" service information bulletins on subject of coding.
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:
- EWS (electronic immobilizer)
- DME (Digital Motor Electronics) or
- DDE (Digital Diesel Electronics)
Refer to "Diagnosis and Coding" service information bulletins on subject of programming.
IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).
NOTE: Follow instructions for removing and installing electronic control.
Necessary preliminary tasks:
- Read fault memory.
- Disconnect negative battery cable.
- Remove electronics box fan.
- Remove distribution box (passenger compartment).
- Release control unit holder.
Pull rubber grommets out of electronics box. Disconnect all plug connections.
Release screws (arrows).
Disconnect wiring harness on engine compartment side on right.
Remove electronics box.
Installation:
Make sure gasket (1) is correctly seated on electronics box. Add final details to vehicle.
Read fault memory.
READ NEXT:
Alternator With Drive
REPLACING ALTERNATOR BELT PULLEY
Special tools required:
12 7 110.
Remove and install alternator drive belt.
Depending on alternator type, grip shaft with:
hexagon socket
multi-tooth socket or
Regulator
REPLACING VOLTAGE REGULATOR
Necessary preliminary tasks:
Switch off ignition
Disconnect battery negative lead.
Notes on removing and installing electronic control units.
Remove alternator
Bosch:
Starter With Mounting
REMOVING AND INSTALLING/REPLACING STARTER MOTOR (N52, N52K, N51, N53,
N54)
IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical
corrosion.
SEE MORE:
BMW Drive Recorder
Principle
The BMW Drive Recorder stores brief video recordings
of the vehicle surroundings, e.g., to
document surrounding traffic.
General information
There are various ways for storing video recordings:
Automatic storage of the recording.
The function allows the documentation of the
event of an
Fuel Tank With Mounting
REPLACING LEFT OR RIGHT CLAMPING BAND FOR FUEL TANK
Necessary preliminary tasks:
Remove underbody panelling.
IMPORTANT: Secure fuel tank against slipping and falling out.
Heavily support the fuel tank.
Release screws (1) and remove clamping band.
Installation:
Tightening torque.
REMOVING AND INS
