11 78 610 Remove and install/replace monitoring oxygen sensor (B48B)

Special tools required:

11 9 150
11 7 030

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The monitoring oxygen sensor cable is grey (1).

The installation location of the monitoring oxygen sensor is behind the catalytic converter.

WARNING: Risk of burning!
Only perform these tasks after exhaust system has cooled down.

CAUTION: Damage to wires when disconnecting plugs and plug connections.
Sheared wiring could cause a short circuit.
When disconnecting plugs and plug connections, do not pull on the cables.

Necessary preliminary work:

Remove ACOUSTIC COVER AT REAR

Removal:

Release connector (1) using screwdriver (2) and remove from carrier plate.

Unlock and disconnect connector (1).

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Unhook oxygen sensor cable (1) in marked areas.

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Loosen monitoring oxygen sensor (1) with special tool 11 9 150 and 11 7 030 .

Remove the monitoring oxygen sensor.

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Installation:

NOTE: When reusing oxygen sensor:
Apply thin and uniform coating to oxygen sensor on thread only using NEVER-SEEZ compound OVERVIEW OF CONSUMABLES 4.3 .
Do not clean and do not coat sensor ceramics (oxygen sensor section in exhaust branch) with lubricant.

Screw in monitoring oxygen sensor (1).

Tighten monitoring oxygen sensor with special tool 11 9 150 and 11 7 030 .

Tightening torque: 11 78 1AZ .

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Attach oxygen sensor cable (1) in marked areas.

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Connect the connector (1) and clip into carrier plate.

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Required follow-up work:

Install ACOUSTIC COVER, REAR