Crankshaft Position Sensor: Service and Repair

12 14 521 - Replacing pulse generator on crankshaft (M54/M56)





Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Switch off ignition
- E46, E60, E61 only:
Remove reinforcement plate on front axle support.

Important!
The section Removing and installing reinforcement plate on front axle support Service and Repair contains important installation instructions.

- If fitted:
Remove vacuum reservoir for exhaust flap.





All models:

Note:
Installation location of pulse generator for crankshaft is underneath starter motor.





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

Unlock plug (1) and remove.

Unscrew bolt (2).
Remove pulse generator (3).





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