11 78 540 Replacing left monitoring sensor (N63 hybrid)

Special tools required:

WARNING: High-voltage system - danger to life!

WARNING: Scalding hazard!
Only perform this work after engine has cooled down.

Necessary preliminary tasks:

Release retaining clip (1).

Remove heat shield wire ring (2) over oxygen sensor.

Detach oxygen sensor cable from retaining clips (3).

Fig 1: Identifying Oxygen Sensor, Wire Ring And Retaining Clip

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Removing/Installing Monitoring Sensor Using Special Tool (11 7 020)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

The threads of new lambda control/monitoring sensors are already coated with Never Seez Compound (refer to BMW Parts Department).

If a lambda control/monitoring sensor is to be reused, apply a thin and even coating of Never Seez Compound to the thread only.

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

Tightening torque 11 78 1AZ .

Fig 3: Removing/Installing Monitoring Sensor Using Special Tool (11 7 020)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Check function of DME control unit.

Pay attention to cable routing of monitor sensor.