12 14 600 Removing/replacing knock sensors (N54)

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Jointing torque and angle of rotation must be observed without fail (risk of damage) .

Necessary preliminary tasks:

Read out the fault memory of the DME control unit.
Switch off ignition.
Remove INTAKE PLENUM .

Unlock connector (1) and remove.

Feed out connector (1) behind feed line, remove FEED LINE if necessary.

Fig 1: Identifying Knock Sensors Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws on both knock sensors (1) and remove knock sensors (1).

Installation note:

Replace aluminum screws.
Tightening torque 13 62 5AZ .

Fig 2: Locating Knock Sensors Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Clean contact surface of knock sensors on engine block.

Fig 3: Locating Engine Block And Knock Sensors Contact Surface

Courtesy of BMW OF NORTH AMERICA, INC.

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