11 78 530 Replacing Left Control Sensor

11 78 530 Replacing left control 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 pressure pipe.





Release plug connector (1) and pull off.

Unclip control sensor cable (2) at retaining clips.





Release control sensor with special tool 11 7 020.





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 control sensor with special tool 11 7 020 and a torque wrench (1).

Tightening torque 11 78 1AZ.





Installation:
Check function of DME control unit.

Pay attention to cable routing of control sensor.