12 14 600 Removing/replacing knock sensors (N55)

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 INTAKE PLENUM .
Vehicles with the Bosch high pressure pump only :

Remove HIGH PRESSURE PUMP .

Unlock connector (1) and remove.

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

Fig 1: Identifying Connector

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

Tightening torque 13 62 3AZ .

Fig 2: Locating Knock Sensors

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Installation note:

Clean contact surface of knock sensors on engine block.

Fig 3: Locating Contact Surface Of Knock Sensors On Engine Block

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NOTE: Reassemble the vehicle.
Check stored error/fault messages.
Clear diagnostic fault entries from fault memory.