12 14 600 Replacing knock sensor

Necessary preliminary tasks: 

• Switch off ignition
• Read out fault memory of DME control unit
• Check stored fault messages

Unlock and disconnect knock sensor plug connection.

Fig 1: Removing Knock Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Release knock sensor screw, remove knock sensor (1).

Installation: 

Clean contact surface of knock sensors.

Tightening torque 12 14 1AZ. Refer to ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Observe position of knock sensor in relation to engine block.

At angle of 20° to the perpendicular.