11 78 513 Replacing Both Oxygen Control Sensors

11 78 513 Replacing both oxygen control sensors (N52T)

Special tools required:





Warning!
Scalding hazard!
Work should only be carried out on an exhaust system that has cooled down.





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

If a oxygen control sensor is to be reused, apply a thin and even coating of Never Seez compound to the thread only.

The part of the oxygen control sensor which projects into the exhaust system branch (sensor ceramics) must not be cleaned and not coated with lubricant.





Oxygen control sensor, cylinder nos. 1 to 3:

Note:
The oxygen control sensor on the exhaust manifold of cylinder nos. 1 to 3 is accessible from above.

Disconnect plug connection.

Unclip the cable from the holder.

Release oxygen control sensor on exhaust manifold of cylinder nos. 1 to 3 with special tool 11 7 020.





Oxygen control sensor, cylinder nos. 4 to 6:

Note:
The oxygen control sensor on the exhaust manifold of cylinder nos. 4 to 6 is accessible from above.

Disconnect plug connection.

Unclip the cable from the holder.

Release screws (1) on retaining plate.

Remove retaining plate (3).

Release oxygen control sensor (2) on exhaust manifold of cylinder nos. 4 to 6 with special tool 11 7 020.





All:

Installation:
Cable colour of oxygen control sensor, cylinders nos. 1 to 3 = black.

Cable colour of oxygen control sensor, cylinders nos. 4 to 6 = grey.

Tightening torque 11 78 1AZ.

Assemble engine.

Check function of DME.