12 14 600 Removing/replacing knock sensors (N55)

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 Knock Sensors Plug

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

Tightening torque: 13 62 5AZ .

Fig 2: Locating Knock Sensors

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Installation note: 

Clean contact surface of knock sensors on engine block.

Fig 3: Locating Knock Sensors On Engine Block

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