Crankshaft Position Sensor: Service and Repair

12 14 521 Replacing crankshaft pulse sensor (N54, N54T)







IMPORTANT: Read and comply with notes on protection against electrostatic discharge (ESD protection).







IMPORTANT:
Aluminium screws/bolts must be replaced each time they are released.
Aluminium screws/bolts are permitted with and without colour coding (blue).
For reliable identification:
Jointing torque and angle of rotation must be observed without fail (risk of damage).







Necessary preliminary tasks:
- Read out fault code memory of the DME control unit.
- Switch off ignition
- Remove tension strut from spring strut dome on left







NOTE: Installation location of pulse sensor for crankshaft is underneath starter motor.

Detach plug (1) from crankshaft pulse sensor (2).
Release screw.

Installation note:
Replace aluminium screws.
Tightening torque 12 14 2AZ.
Withdraw pulse sensor (2) from crankcase.

Installation note:
Replace sealing ring.







NOTE:
Check stored fault messages.
Delete fault memory.