11 78 530 Replacing left oxygen control 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
11 9 150

(cylinder bank 5 to 8)

Necessary preliminary tasks:

Switch off ignition.
Remove reinforcement plate.

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

Unlock and detach plug connection (3).

Unclip oxygen control sensor cable.

Fig 1: Unlocking And Detaching Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Release oxygen control sensor (4) with special tool 11 7 030 in conjunction with 11 9 150.

Fig 2: Releasing Oxygen Control Sensor With Special Tool 11 7 030 In Conjunction With 11 9 150

Courtesy of BMW OF NORTH AMERICA, INC.

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:

When using special tool 11 9 150 in conjunction with special tool 11 7 030, 47 Nm on torque wrench scale corresponds to an actual tightening torque of 50 Nm.
Tighten down oxygen control sensor (4) with special tool 11 7 030 in conjunction with 11 9 150.

Fig 3: Tightening Down Oxygen Control Sensor With Special Tool In Conjunction

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque, refer to 11 78 1AZ in ENGINE - TIGHTENING TORQUES .

Pay attention to cable routing of oxygen control 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.