12 14 600 Removing/replacing knock sensor (3rd and 4th cylinder) (N20, N26)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Read out the fault memory of the DME control unit.
Switch off ignition.
Remove STARTER MOTOR .

Unlock connector (1) and remove.

Release bolt (2) on knock sensor.

Tightening torque 13 62 4AZ .

Remove knock sensor for 3rd and 4th cylinders.

Fig 1: Identifying Connector And Bolt On Knock Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Clean contact surface of knock sensor on engine block.

Fig 2: Locating Contact Surface Of Knock Sensors On Engine Block

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Reassemble the vehicle.
Check stored fault message.
Delete fault memory.