12 14 611 Removing/replacing the left knock sensors (N63, B40/B44 O 1)

WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 2017 BMW 550i GT xDrive, 2017 BMW 535i GT xDrive, 2017 BMW 535i GT, 2016 BMW 550i GT xDrive, and 2016 BMW 535i GT xDrive. 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 LEFT INTAKE PLENUM .

Unlock and disconnect connector (1) on both knock sensors.

Release screws on both knock sensors (2).

Tightening torque 13 62 5AZ .

Remove knock sensors (3).

Fig 1: Identifying Knock Sensors, Connectors, And Screws

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Installation note:

Clean contact surface of knock sensors on engine block.

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

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NOTE: Check stored fault message.
Delete fault memory.