Remove and install/replace front oxygen sensor (B46/B48 4-Cyl. Engine) (4' Series Coupe/Convertible, 4' Series Gran Coupe Sedan)
Special tools required:
- 11 7 020
The cable on the front oxygen sensor (1) is black .
The installation location of the front oxygen sensor is before the catalytic converter .
Only perform these tasks after exhaust system has cooled down.
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 .
- Remove INTAKE FILTER HOUSING .
Removal:
Release connector (1) using screwdriver (2) and remove from carrier plate.
Unlock and disconnect connector (1).
Unhook oxygen sensor cable (1) in marked areas.
If applicable, slightly lift the rear acoustic cover.
Release front oxygen sensor (1) with special tool 11 7 020.
Installation:
Apply thin and uniform coating of high-temperature paste to threads of oxygen sensor (refer to item 4.3 in OVERVIEW OF CONSUMABLES ).
Do not clean and do not coat sensor ceramics (oxygen sensor section in exhaust branch) with lubricant.
Screw in front oxygen sensor (1) and tighten with special tool 11 7 020.
Tightening torque: 11 78 1AZ .
Mount front oxygen sensor (1) in the areas marked.
If applicable, correctly install the rear acoustic cover.
Connect the connector (1) and clip into carrier plate.
Required follow-up work:
- Install INTAKE SILENCER HOUSING .
- Install ACOUSTIC COVER .