Necessary preliminary tasks

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 328xi, and 2010 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.

Read out fault memory of DME control unit
Turn off ignition
Disconnect NEGATIVE BATTERY CABLE
Remove INTAKE PLENUM

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 aluminium screws.

Tightening torque 12 14 1AZ .

Fig 2: Locating Knock Sensors

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Installation:

Clean support face of knock sensors on engine block.

Fig 3: Locating Contact Surface Of Knock Sensors On Engine Block

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NOTE: Check stored fault messages.

Delete fault memory.