Knock Sensor: Service and Repair

12 14 600 - Replacing knock sensor (M52TU/M54/M56)





Necessary preliminary tasks:
- Check stored fault messages.
- Switch off ignition.
- Remove intake air manifold Service and Repair.





Unclip plug connection (1) from holder of cable duct (2) and disconnect.





Release screw (1) and remove knock sensor for cylinder bank 1-3.





Release screw (2) and remove knock sensor for cylinder bank 4-6.





Installation:
Clean support face of knock sensors on engine block.
Tightening torque, 12 14 2AZ.





Installation:
Read out fault memory of control unit of Digital Motor Electronics (DME).
Now clear the fault memory.