12 14 610 Replacing right knock sensors (cylinder bank 1-4) (S62)

Interrogate fault memory of DME control unit.

Switch off ignition.

Remove manifold for intake air, refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (S62) .

NOTE: Remove and install idle speed control valve, refer to 13 41 500 REPLACING IDLE SPEED CONTROL VALVE (S62) .

Unclip plug connections (1) and (2).

Fig 1: Removing Retaining Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (3).

Remove retaining bracket (4).

NOTE: For a better overview, the following work step is shown on an engine that has been removed.

Disconnect plug connection (1) of right knock sensor pair from cable duct.

Fig 2: Disconnecting Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Remove and install throttle actuator,

refer to 12 72 010 REMOVING AND INSTALLING/REPLACING THROTTLE ACTUATOR (S62) .

Loosen screws (1).

Tightening torque, 12 14 2AZ. Refer to ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Unclip cable of knock sensors from cable guides.

Fig 3: Unclipping Cable Of Knock Sensors From Cable Guides

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Knock sensor (2) monitors combustion of cylinders 1 and 2.
Knock sensor (3) monitors combustion of cylinders 3 and 4.

CAUTION: Confusing the plug connections of knock sensors gives rise to engine damage. The routing of wires and the plug connections must correspond to the original routing so as to avoid mix-ups.

Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Now clear the fault memory.