12 14 600 Removing/replacing knock sensors (N55)

Necessary preliminary tasks:

Recycling:

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel.

Observe country-specific waste disposal regulations.

Unlock connector (1) and remove.

Fig 1: Identifying Knock Sensor Connector

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

Installation note:

Tightening torque 13 62 3AZ .

Fig 2: Locating Screws On 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 fault messages.
Clear diagnostic fault entries from fault memory.