12 14 604 Replacing knock sensor (cylinder 3. and 4.) (B48, B46)

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks:

Removal:

Unlock connector (1) and pull off.

Release screw (2).

Remove knock sensor (3).

Fig 1: Knock Sensor, Connector And Screw

Courtesy 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 13 62 3AZ .

Attach connector (1).

Connector (1) must engage audibly.

Fig 2: Knock Sensor, Connector And Screw

Courtesy of BMW OF NORTH AMERICA, INC.