11 78 533 Replacing right control sensor (N74)

Only perform this work after engine has cooled down.

Necessary preliminary tasks: 

• Check function of DME control unit
• Turn off ignition
• Remove right CHARGE AIR PIPE

Release plug connector (1) and pull off.

Unclip control sensor cable (2) from holder.

Fig 1: Identifying Control Sensor Cable And Plug Connector

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Prepare special tool 11 4 260 with a 15° extension (1).

Fig 2: Preparing Special Tool 11 4 260 With Angle Extension

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Release control sensor with special tool 11 4 260 .

Fig 3: Releasing Control Sensor Using Special Tool 11 4 260

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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.

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 4 260 and a torque wrench (1).

Tightening torque: see 1AZ in 11 78 EMISSIONS CONTROL, CONTROL SENSOR / MONITORING SENSOR

Fig 4: Securing Control Sensor Using Special Tool 11 4 260

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Check function of DME control unit.

Pay attention to cable routing of control sensor.