12 14 611 Replacing left knock sensors (N62, N62TU)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

(cylinder bank 5 to 8)

Necessary preliminary tasks:

Read out fault memory of DME control unit
Check stored fault messages
Switch off ignition
Remove intake air manifold . See 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N62) .

IMPORTANT: Mixing up the knock sensor plug connections will result in engine damage!
Routing of wires and plug connections must conform to the original routing. This eliminates the risk of confusion and mix-ups.

Release bolts.

Tightening torque 12 14 1AZ . See 12 14 ELECTRONIC SHIFT UNITS OR CONTROL UNITS .

Remove knock sensors (1).

Fig 1: Identifying Knock Sensors

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Now clear the fault memory.