11 78 543 Replacing right oxygen monitor sensor (N62/N62TU)

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, refer to ENGINE - SPECIAL TOOLS - 645CI .

Special Tools Required:

11 7 030

(cylinder bank 1 to 4)

Switch off ignition.

WARNING: Scalding hazard! Only perform this task on an engine that has cooled down.

Unlock and detach plug connection (1) for oxygen monitor sensor (2).

Fig 1: Unlocking Plug Connection For Oxygen Monitor Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip oxygen monitor sensor cable.

Release oxygen monitor sensor (2) with special tool 11 7 030.

Installation:

Threads of new oxygen sensors are already coated with Never Seez compound.
If an oxygen sensor is reused, only apply a thin and uniform coat of Never Seez compound to thread.
Oxygen sensor section projecting into exhaust system branch must not be cleaned or come into contact with lubricant.

Installation:

Tighten down oxygen monitor sensor (2) with special tool 11 7 030.
Tightening torque, refer to 11 78 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 2: Tightening Down Oxygen Monitor Sensor With Special Tool 11 7 030

Courtesy of BMW OF NORTH AMERICA, INC.

Pay attention to cable routing of oxygen monitor sensor.

Installation:

Read out fault memory of control unit of Digital Motor Electronics (DME).

Check stored fault messages.

Rectify faults.

Now clear the fault memory.