12 14 600 Replacing knock sensor (M52TU, M54, M56)

WARNING: This page is about a different car, the 2003 BMW 530i, 2002 BMW 530i, and 2001 BMW 530i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Check stored fault messages.
Switch off ignition.
Remove intake air manifold, refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (M54) .

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

Fig 1: Disconnecting Knock Sensor Plug Connection From Holder

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Removing Knock Sensor (Cylinder Bank 1-3)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Removing Knock Sensor (Cylinder Bank 4-6)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean support face of knock sensors on engine block.

Fig 4: Installing Knock Sensors

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque, refer to 12 14 2AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Installation:

Read out fault memory of control unit of Digital Motor Electronics (DME).

Now clear the fault memory.