11 78 540 Replacing left monitoring sensor (S63)

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Special tools required:

11 7 020

WARNING: Risk of burning!
Only perform repair work after engine has cooled down.

Necessary preliminary tasks:

Check function of DME control unit
Switch off ignition
Remove DME CONTROL UNIT HOLDER

Detach oxygen sensor cable (1) from the retaining clips (3).

Fig 1: Identifying Control Sensor Cable And Retaining Clips

Courtesy of BMW OF NORTH AMERICA, INC.

Remove heat shield wire ring over oxygen sensor.

Detach oxygen sensor cable from retaining clips.

Release monitoring sensor (1) with special tool 11 7 020 .

Fig 2: Releasing Monitoring Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

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

If a lambda control/monitoring 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/monitoring sensor which projects into the exhaust branch (sensor ceramics) must not be cleaned and not coated with lubricant.

Fasten monitoring sensor (1) with special tool 11 7 020 .

Tightening torque 11 78 1AZ .

Graphic N63.

Fig 3: Releasing Monitoring Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Check function of DME control unit.

Pay attention to cable routing of monitor sensor.