11 78 610 Replacing oxygen monitoring sensors (N20, N26)

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Special tools required:

11 7 030

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

Necessary preliminary work:

Remove CATALYTIC CONVERTER .

Installation note:

The threads of new oxygen monitoring sensors are already coated with NEVER SEEZ COMPOUND 4.3.

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: Plug Connection Of Monitoring 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: Releasing Oxygen Monitoring Sensor With Special Tool (11 7 030)

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check function of DME.