12 14 611 Replacing Knock Sensors On Left Side (Cylinder Bank 7-12 N73)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2006 BMW 760i, 2006 BMW 760Li, 2005 BMW 760i, 2005 BMW 760Li, and 2004 BMW 760i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary Preliminary Tasks:

Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N73) .
Disconnect left and right intake lines.
Disconnect high-pressure lines. Refer to 13 53 175 REMOVING AND INSTALLING/REPLACING ALL PRESSURE LINES (N73) .
Remove HDEV fuel rail.
Detach HDEV wiring harness. Refer to 12 51 150 REMOVING AND INSTALLING/REPLACING WIRING HARNESS SECTION FOR FUEL INJECTORS (N73) .

IMPORTANT: Confusing the plug connections of knock sensors gives rise to engine damage. The routing of wires and the plug connections must correspond to the original routing so as to avoid mix-ups.

Disconnect plug connection (1) from holder.

Remove knock sensors (2).

Installation:

Knock sensors can only be replaced in sets.

Fig 1: Disconnecting Plug Connection From Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew bolt (1).

Remove knock sensor (2).

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

Installation:

Contact surfaces of knock sensors must be free from grease and dust.

Fig 2: Removing Knock Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME.