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

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2005 BMW 325xi, 2005 BMW 325i, 2005 BMW 325Ci, 2004 BMW 325xi, and 2004 BMW 325i. 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: Uncliping Plug Connection From Holder Of Cable Duct

G03164307

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

G03164308

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

G03164309

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean support face of knock sensors on engine block.

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

G03164310

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque: 13 N.m.

Installation:

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

Now clear the fault memory.