12 14 611 Removing/replacing left knock sensors (N63)

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Necessary preliminary tasks:

Read out fault memory of DME control unit
Switch off ignition
Disconnect battery negative lead , see 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .
Remove left intake manifold , see 11 61 065 REMOVING AND INSTALLING/REPLACING LEFT INTAKE MANIFOLD (N63) .

Unlock and disconnect plugs (1) on both knock sensors.

Release screws on both knock sensors (2).

Tightening torque13 62 5AZ, see 13 62 SENDERS FOR CONTROL UNIT .

Remove knock sensors (3).

Fig 1: Identifying Knock Sensors And Plugs

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean support face of knock sensors on engine block.

Fig 2: Identifying Knock Sensors On Engine Block

Courtesy of BMW OF NORTH AMERICA, INC.

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