11 78 510 Replacing oxygen control sensor (N55)

Special tools required:

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 .
Remove PARTITION WALL of units compartment at center and right.

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

Tightening torque 11 78 1AZ .

Fig 2: Releasing Oxygen Sensor With Special Tool (11 4 260)

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check function of DME.