Replacing Right Lambda Oxygen Monitor Sensor

11 78 543 - Replacing right lambda oxygen monitor sensor (N73)





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





Cylinders 1 to 6.

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





Warning!
Scalding hazard!

Only perform these tasks after the exhaust system has cooled down.





Unlock and detach plug connection (1).

Release oxygen monitor sensor (2) with special tool 11 7 030 11 7 030 Socket Wrench Socket WAF 22.

Installation:
Pay attention to cable routing of oxygen control sensor.





Tighten down oxygen monitor sensor (2) with special tool 11 7 030 11 7 030 Socket Wrench Socket WAF 22.

Tightening torque, 11 78 1AZ 11 78 Emissions-Control, Lambda Oxygen Sensor.

Installation:
If an 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.