12 14 611 Removing/replacing left knock sensors (N74)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2016 BMW 760Li, 2015 BMW 760Li, 2014 BMW 760Li, 2013 BMW 760Li, and 2012 BMW 760Li. 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 INTAKE PIPE, LEFT .

Feed out vacuum hose (1) and set aside.

Fig 1: Identifying Feed Out Vacuum Hose

G08469599

Courtesy of BMW OF NORTH AMERICA, INC.

Release positive battery cable from clamps

(1) and set aside.

Fig 2: Identifying Positive Battery Cable Clamps

G08469600

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) on both knock sensors.

Tightening torque: see 4AZ in 13 62 SENDERS FOR CONTROL UNIT

Remove knock sensors.

Installation note:

Clean contact surface of knock sensors on engine block.

Fig 3: Identifying Knock Sensors Screws

G08469601

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach connector (1) from knock sensors on the front of the expansion tank for the charge air cooler.

Feed out and remove knock sensors, right.

Fig 4: Identifying Knock Sensor Connector

G08469602

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check stored fault message.

Delete fault memory.