11 78 540 Replacing left monitor sensor (S65)

WARNING: This page is about a different variant/trim than selected.

WARNING: Scalding hazard!
Only perform these tasks after exhaust system has cooled down.

Necessary preliminary tasks:

Read out fault memory in Digital Motor Electronics (DME)
Remove transmission underbody protection

Disconnect plug connection (1).

Remove monitor sensor with special tool 11 7 030.

Installation:

If the monitor sensor is reused, only apply a thin and uniform coat of Never Seez Compound to thread.

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

Fig 1: Identifying Monitor Sensor And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Reinstall plug connection (1) and cable routing without fail in condition on delivery (see illustration).
Risk of damage if this instruction is not observed!

Secure monitor sensor (2) with special tool 11 7 030 and a torque wrench.

Tightening torque: 11 78 1AZ .

Add final details to vehicle.

Check function of DME.