12 14 600 Replacing Knock Sensor(s) (S54)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW M3, 2005 BMW M3, 2004 BMW M3, 2003 BMW M3, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
Interrogate fault memory of DME control unit. Switch off ignition.
Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (S54) .
Release nuts and place idle-speed control valve (1) to one side.
Unlock plug and detach from knock sensor.
Release knock sensor screw connection on engine block.
Installation:
Tightening torque, refer to 12 14 2AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .
Remove knock sensor.
Installation:
- Clean contact surface of knock sensors on engine block.
NOTE:
Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.