11 78 510 Replacing oxygen control sensor (N55)
Special tools required:
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 an 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 branch (sensor ceramics) must not be cleaned and not coated with lubricant.
Necessary preliminary work:
- Remove rear ignition coil cover. See 12..... REMOVING AND INSTALLING/REPLACING REAR IGNITION COIL COVER (N55) .
- Remove REINFORCEMENT PLATE .
Disconnect plug connection on oxygen control sensor (1).
Installation note:
Cable color of oxygen control sensor = black.
Cable color of oxygen monitoring sensor = grey.
Unclip cable (1) of control sensor out of holder.
Release oxygen sensor (1) from above with special tool 11 4 260 .
Tightening torque: 11 78 1AZ .
Reassemble the vehicle.
Check function of DME.