11 78 513 Replacing Both Oxygen Control Sensors

11 78 513 Replacing both lambda oxygen control sensors (N52K)

Special tools required:





Warning!
Risk of burning!
Work should only be carried out on an exhaust system that has cooled down.

Installation note:
The threads of new oxygen control sensors are already coated with Never-Seez(R) Compound (refer to BMW Parts Department).





If a oxygen control sensor is to be reused, apply a thin and even coating of Never-Seez(R) compound to the thread only.
The part of the lambda control sensor which projects into the exhaust system branch (sensor ceramics) must not be cleaned and not coated with lubricant.





Lambda control sensor, cylinder nos. 1 to 3:

Note:
The lambda control sensor on the exhaust manifold of cylinder nos. 1 to 3 is accessible from above. The exhaust system does not have to be removed.





Lambda control sensor, cylinder nos. 1 to 3:

Necessary preliminary tasks:
^ Remove exhaust system (only E60,E61,E63,E64)

Disconnect plug connection on oxygen control sensor (1).





Release lambda control sensor (1) on exhaust manifold of cylinder nos. 4 to 6 with special tool 11 4 260.





All:

Installation note:
Cable color of lambda control sensor, cylinders nos. 1 to 3 = black.

Cable color of lambda control sensor, cylinders nos. 4 to 6 = gray.

Tightening torque 11 78 1AZ.

Assemble engine.

Check function of DME.