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Home >> BMW >> 2018 >> 340i xDrive Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 256 (Engine Electrical System - Repair (F30, 4-CYL RWD)) >> 12 14 Electronic Switching Or Control Units >> 12 14 604 Replacing the knock sensor at cylinders 3-4 (B48)

12 14 604 Replacing the knock sensor at cylinders 3-4 (B48)

WARNING: This page is about a different car, the 2018 BMW 330i and 2017 BMW 330i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks: 

Removal: 

Unlock and disconnect plugs (1).

Release screw (2).

Remove knock sensor (3).

G12701490Courtesy of BMW OF NORTH AMERICA, INC.

Preparation for installation: 

Clean contact surface of knock sensor on engine block.

Installation: 

Install knock sensor (3).

Tighten screw (2).

Observe tightening torque without fail!

Tightening torque, refer to: 13 62 5AZ .

Attach and lock connector (1).

Connector (1) must engage audibly.

G12701490Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work: