Knock Sensor: Service and Repair

12 14 600 - Removing/replacing knock sensors (N54)





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 memory of DME control unit.
- Switch off ignition.
- Remove intake air manifold Service and Repair.





Unlock plug (1) and remove.
Feed out plug (1) behind feed line, remove feed line 13 53 332 Removing and Installing/Replacing Feed Line if necessary.





Release screws on both knock sensors (1) and remove knock sensors (1).

Installation Note:
- Replace aluminium screws.
- Tightening torque 13 62 5AZ 13 62 Senders for Control Unit.





Installation Note:
Clean contact surface of knock sensors on engine block.





Note:
Add final details to vehicle.
Check stored fault message.
Now clear the fault memory.