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

Necessary preliminary work: 

• Read out the fault memory of the DME control unit.
• Switch off ignition.
• Disconnect BATTERY EARTH LEAD .
• Remove LEFT INTAKE PLENUM .

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

Release screws on both knock sensors (2).

Tightening torque 13 62 5AZ .

Remove knock sensors (3).

Fig 1: Identifying Screws On Knock Sensors And Connector

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Installation note: 

Clean contact surface of knock sensors on engine block.

Fig 2: Locating Contact Surface Of Knock Sensors On Engine Block

Courtesy of BMW OF NORTH AMERICA, INC.