11 78 510 Replacing oxygen control sensor (AWD) (N55)

Special tools required:

WARNING: Risk of burning!
Work should only be carried out on an exhaust system that has cooled down.

Installation note:

The threads of new oxygen control sensors are already coated with Never Seez Compound.

If a oxygen control sensor is to be reused, apply a thin and even coating of Never Seez compound to the thread only.

The part of the lambda control sensor which projects into the exhaust system branch (sensor ceramics) must not be cleaned and not coated with lubricant.

Necessary preliminary tasks

Remove MICROFILTER HOUSING .
Remove right TRAILING LINK .
Remove INTAKE SILENCER HOUSING .
Remove ignition coil cover. See 12..... REMOVING AND INSTALLING/REPLACING IGNITION COIL COVER (N55) .
Remove front underbody protection . See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION or 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION (AWD) .
Remove BEARING SUPPORT of output shaft.

Disconnect plug connection on oxygen control sensor (1).

Installation note:

Cable color of oxygen control sensor = black.

Cable color of oxygen monitoring sensor = grey.

Fig 1: Identifying Plug Connection On Oxygen Control Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Release oxygen control sensor (1) with special tools 11 7 030 and 11 9 150 .

Tightening torque: 11 78 1AZ .

IMPORTANT: When using special tool 11 7 030 in conjunction with special tool 11 9 150 , it is essential to reduce the prescribed tightening torque by 3 Nm.

Fig 2: Removing Oxygen Control Sensor Using Special Tools 11 7 030 And 11 9 150

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check function of DME.