12 14 600 Removing/replacing knock sensors (N55)

Necessary preliminary tasks

Unlock connector (1) and remove.

Feed out and remove the connector (1) behind the feed line.

Fig 1: Identifying Connector

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

Installation note:

Fig 2: Identifying Knock Sensors

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Installation note:

Clean contact surface of knock sensors on engine block.

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

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