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

WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW 330xi, 2005 BMW 330i, and 2005 BMW 330Ci. 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. See 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (M54)

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

Fig 1: Removing Plug Connection From Holder Of Cable Duct

G03123591

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Releasing Screw & Removing Knock Sensor For Cylinder Bank 1 - 3

G03123592

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Releasing Screw & Removing Knock Sensor For Cylinder Bank 4 - 6

G03123593

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean support face of knock sensors on engine block.

Tightening torque. Refer to TORQUE SPECIFICATIONS .

Fig 4: Cleaning Support Face Of Knock Sensors On Engine Block

G03123594

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Now clear the fault memory.