11 78 545 Removing and installing/replacing monitor sensor (N18)

Special tools required:

11 7 020

WARNING: Risk of burning!
Only perform these tasks after the exhaust system has cooled down.

Installation note:

If an oxygen sensor is reused, thinly and evenly coat only the thread with NEVER-SEEZ compound OVERVIEW OF CONSUMABLES 4.3 .

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

Disconnect plug connection of monitoring sensor.

Release monitoring sensor (1) with special tool 11 7 020 .

Tightening torque 11 78 1AZ .

Fig 1: Releasing Monitoring Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Make sure that the cable routing is correct.

Check function of DME.