11 78 543 Replacing Right Monitor Sensor

11 78 543 Replacing right monitor sensor (N74)

Special tools required:





Warning!
Scalding hazard!
Only perform this work after engine has cooled down.





Necessary preliminary tasks:
^ Check function of DME control unit
^ Switch off ignition.
^ Remove engine underbody protection





Detach monitoring sensor (1) from catalyst cylinders 1 - 6 with special tool 11 7 030 and 11 9 150.

Remove monitor sensor (1).





Installation:
The threads of new lambda control/monitoring sensors are already coated with Never Seez Compound (refer to BMW Parts Department).

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.





Secure monitoring sensor (1) with special tool 11 7 030 and 11 9 150.

Tightening torque 11 78 1AZ.

Important!
When using special tool 11 7 030 in conjunction with 11 9 150, it is essential to reduce the prescribed tightening torque by 3 Nm to 47 Nm.





Installation:
Check function of DME control unit.

Pay attention to cable routing of monitor sensor.