12 14 600 Removing/replacing knock sensors (N54)

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: 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:

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

Necessary preliminary tasks

Read out fault memory of DME control unit.
Switch off ignition.
Remove INTAKE AIR MANIFOLD .

Unlock plug (1) and remove.

Feed out plug (1) behind feed line, remove FEED LINE if necessary.

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 5AZ .

Fig 2: Locating Knock Sensors

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Installation

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: Add final details to vehicle.

Check stored fault message.

Now clear the fault memory.