11 78 610 Replacing lambda oxygen monitoring sensor (AWD) (N55)
WARNING:
Risk of burning!
Work should only be carried out on an exhaust system that has cooled down.
Work should only be carried out on an exhaust system that has cooled down.
Necessary preliminary tasks
- Remove MICROFILTER HOUSING .
- Remove INTAKE SILENCER HOUSING .
- Remove rear ignition coil cover. See 12..... REMOVING AND INSTALLING/REPLACING IGNITION COIL COVER (N55) .
- Remove UNDERBODY PROTECTION .
Installation note:
The threads of new lambda 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.
The part of the lambda monitoring sensor which projects into the exhaust system branch (sensor ceramics) must not be cleaned and not coated with lubricant.
Disconnect plug connection of monitoring sensor (1).
Installation note:
Cable color of control sensor = black.
Cable color of monitoring sensor = grey.
Release monitoring sensor.
Tightening torque: 11 78 1AZ .
Reassemble the vehicle.
Check function of Digital Engine Electronics.