11 78 610 Replacing oxygen monitoring sensors (N20)

Special tools required:

WARNING: Risk of burning.

Work should only be carried out on an exhaust system that has cooled down.

Necessary preliminary work:

Installation note:

The threads of new oxygen monitoring sensors are already coated with NEVER-SEEZ COMPOUND .

If a lambda monitoring sensor is to be reused, apply a thin and even coating of Never-Seez Compound to the thread only.

Sensor ceramics must not be cleaned and not be coated with lubricant.

Disconnect plug connection on lambda monitoring 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 monitoring sensor with special tool 11 7 030.

Tightening torque 11 78 2AZ .

Fig 2: Identifying Oxygen Monitoring Sensor And Special Tool (11 7 030)

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check function of DME.