Removing and Installing/Replacing Both Lambda Oxygen Control Sensors

11 78 513 - Removing and installing/replacing both lambda oxygen control sensors (N52)





Special tools required:
- 11 4 260 11 4 260 Box Spanner





Warning!
Scalding hazard!

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





Necessary preliminary tasks:
- Remove exhaust system.





Installation Note:
If an oxygen sensor is to be reused, only apply a thin and uniform coat of Never Seez Compound (refer to BMW Parts Service) to thread.

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





Disconnect plug connection for lambda control sensor.

Detach oxygen sensor (1) from cylinders 4 to 6 with special tool 11 4 260 11 4 260 Box Spanner.

Oxygen sensor at cylinders 1 to 3 is accessible from above without the exhaust system having to be removed.

Installation Note:
Cable color black, cylinders 1 to 3.

Cable color gray, cylinders 4 to 6.

Tightening torque: 11 78 1AZ 11 78 Emissions Control, Control Sensor / Monitor Sensor.





Assemble engine.

Check function of DME.