Replacing Knock Sensors on Left Side (Cylinder Bank 7-12 N73)

12 14 611 - Replacing knock sensors on left side (cylinder bank 7-12 N73)





Necessary preliminary tasks:
- Remove intake air manifold Service and Repair.

- Disconnect left and right intake lines.

- Disconnect high-pressure lines Service and Repair.

- Remove HDEV fuel rail Service and Repair.

- Detach HDEV wiring harness 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 Note:
Knock sensors can only be replaced in sets.





Release screw (1).
Remove knock sensor (2).
Tightening torque: 12 14 1AZ 12 14 Electronic Shift Units or Control Units

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





Assemble engine.
Check function of DME.