12 14 600 Removing/replacing knock sensors (N52K)

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: Aluminium-magnesium materials.

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminum screws/bolts exclusively.

Aluminum screws/bolts must be replaced each time they are released.

Aluminum screws/bolts are permitted with and without color coding (blue).

For reliable identification:

Aluminum screws/bolts are not magnetic.

Jointing torque and angle of rotation must be observed without fail (risk of damage).

Necessary preliminary tasks:

Unlock plug (1) and remove.

Fig 1: Identifying Plug

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

Installation:

Replace aluminum screws.

Tightening torque 13 62 3AZ .

Fig 2: Locating Knock Sensors

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Installation:

Clean support face of knock sensors on engine block.

Fig 3: Locating Knock Sensors Contact Surface On Engine Block

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NOTE: Check stored fault messages.
Now clear the fault memory.