13 62 622 Removing and refitting/replacing nitrogen oxide sensor downstream of SCR catalytic converter (N47 D20 O 1 with SCR)

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Special tools required:

11 7 020

WARNING: Risk of burning!
Only perform this repair work on an engine that has cooled down.

Necessary preliminary work:

Read out the fault memory of the DDE control unit.
Switch off ignition.
Remove EXHAUST SYSTEM .
Remove heat shield at rear.
Partially detach front heat shield.

Detach nitrogen oxide sensor (2) and remove from exhaust system.

Tightening torque 13 62 8AZ .

Fig 1: Identifying Exhaust System Nitrogen Oxide Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) and pull off.

Unscrew nuts (2).

Tightening torque 13 62 13AZ .

Maneuver out nitrogen oxide sensor and control unit for nitrogen oxide sensor and remove.

Fig 2: Identifying Nitrogen Oxide Sensor Connector And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

After the repair work has been completed:

Use the BMW Diagnosis System to perform the SCR adjustment.

Refer to:

Service function
SCR systems
Carry out activation and adjustments

Installation note:

Check stored error/fault messages.

Clear diagnostic fault entries from fault memory.