11 78 530 Replacing left lambda oxygen control sensor (S65)

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.

Pull plug connection (1) from holder (2).

Disconnect plug connection (1).

Fig 1: Identifying Plug Connection And Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Remove oxygen control sensor with special tool 11 7 030.

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

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.

Fig 2: Removing Oxygen Control Sensor Using Special Tool (11 7 030)

Courtesy of BMW OF NORTH AMERICA, INC.

Secure oxygen control sensor with special tool 11 7 030 and a torque wrench (1).

Tightening torque: 11 78 1AZ .

Check function of DME.