Knock Sensor: Service and Repair

Replacing knock sensor(s) (M52TU / M54)

Turn off ignition.







Remove intake air manifold.







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 contact surface of knock sensors on engine block.
Tightening torque, 12 14 2AZ.







NOTE:
Interrogate fault memory of DME control module.
Check stored fault messages.
Rectify faults
Then clear fault memory.