Necessary preliminary work

Check function of DME control unit
Switch off ignition
Remove AIR FILTER HOUSING

Unlock plug connection and detach.

Unclip control sensor cable from holder.

Release control sensor with special tool 11 7 020 .

Fig 1: Releasing Control Sensor Using Special Tool 11 7 020

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

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.

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

Secure control sensor with special tool 11 7 020 and a torque wrench (1).

Tightening torque 11 78 1AZ .

Fig 2: Securing Control Sensor Using Special Tool 11 7 020 And Torque Wrench

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Check function of DME control unit.

Pay attention to cable routing of control sensor.