11 78 510 Replacing oxygen control sensor (N55)

Special tools required:

11 7 030
11 9 150
11 4 260

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 rear ignition coil cover.

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: Monitoring Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip cable (1) of control sensor out of holder.

Fig 2: Control Sensor Cable

Courtesy of BMW OF NORTH AMERICA, INC.

Release oxygen sensor (1) from above with special tool 11 4 260 .

Tightening torque: 11 78 1AZ .

Fig 3: Releasing Oxygen Sensor From Special Tool (11 4 260)

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check function of DME.