Replacing Left Oxygen Monitor Sensor (S85)

11 78 540 - Replacing right oxygen monitor sensor (S85)





Special tools required:
- 11 7 030 11 7 030 Socket Wrench Socket WAF 22
- 11 9 150 11 9 150 Special Wrench





Warning!
Scalding hazard!

Only perform these tasks after exhaust system has cooled down.





Necessary preliminary tasks:
- Read out fault memory in Digital Motor Electronics (DME).
- Remove transmission underbody protection.





Remove oxygen monitor sensor (1) with special tools 11 7 030 11 7 030 Socket Wrench Socket WAF 22 and 11 9 150 11 9 150 Special Wrench.

Installation Note:
When using special tools 11 7 030 11 7 030 Socket Wrench Socket WAF 22 and 11 9 150 11 9 150 Special Wrench, 47 Nm on torque wrench scale corresponds to an actual tightening torque of 50 Nm.

If the oxygen monitor sensor is reused, apply a thin and even coat of Never-Seez(R) Compound (refer to BMW Parts Service) to the thread only.

The part of the the oxygen monitor sensor which projects into the exhaust system branch (sensor ceramic) must not be cleaned or come into contact with lubricant.





Check function of DME.