11 78 545 Replacing the lambda monitoring sensor (N55 Hybrid)

Special tools required:

11 7 030
11 9 150

WARNING: Compliance with the following points is mandatory before beginning work:

Observe SAFETY INFORMATION for working with electric vehicles.

WARNING: Risk of burning!

Work should only be carried out on an exhaust system that has cooled down.

Installation note:

The threads of new lambda monitoring sensors are already coated with Never Seez Compound.

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

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

Necessary preliminary tasks:

Release positive battery cable (1) from cable channel.

Disengage cable channel cover (2) to the left and lift out.

Fig 1: Identifying Lambda Monitoring Sensor Positive Battery Cable And Cable Channel Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Release wiring harness from cable channel.

Release screws (1).

Release lock (2).

Remove cable channel (3).

Remove soundproofing (4).

Fig 2: Identifying Lambda Monitoring Sensor Screws, Lock, Cable Channel And Soundproofing

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection on oxygen control sensor (1).

Installation note:

Cable color of oxygen control sensor = black.

Cable color of oxygen monitoring sensor = grey.

Fig 3: Identifying Oxygen Control Sensor Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Release oxygen control sensor (1) with special tools 11 7 030 and 11 9 150 with a suitable extension (2).

Tightening torque 11 78 1AZ .

IMPORTANT: When using special tool 11 7 030 in conjunction with special tool 11 9 150, it is essential to reduce the prescribed tightening torque by 3 Nm.

Fig 4: Removing Oxygen Control Sensor Using Special Tools (11 7 030) And (11 9 150)

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check function of DME.