13 62 651 Remove and install or replace the monitoring sensor (N57 D30 O/T 1 with SCR)

Special tools required: 

• 11 7 020

Necessary preliminary tasks: 

• Read out the fault memory of the DDE control unit.
• Switch off ignition.
• Remove rear UNDERBODY PROTECTION .

Release cable from clips (1).

Release cable strap (2).

Unlock connector (3) and remove.

Fig 1: Identifying Cable Strap, Connector And Clips

Courtesy of BMW OF NORTH AMERICA, INC.

Release nitrogen oxide sensor (1), remove from exhaust system and lay to one side.

Tightening torque 13 62 11AZ .

Fig 2: Identifying Nitrogen Oxide Sensor

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Release the monitoring sensor (1) and remove.

Tightening torque 13 62 3AZ .

Fig 3: Identifying Monitoring Sensor

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Installation note: 

Threads of new oxygen sensors are already coated with NEVER-SEEZ compound.

If an oxygen sensor is reused, only apply a thin and uniform coat of Never Seez Compound to thread.

Oxygen sensor section projecting into exhaust branch must not be cleaned or come into contact with lubricant.

Pay attention to cable routing of oxygen sensors.

Tightening torque 13 62 3AZ .

Cover oxygen sensors when applying underbody protection.

Installation note: 

Check stored error/fault messages.

Clear diagnostic fault entries from fault memory.