Removing and Installing Oxygen Sensors In Front of Catalytic Converter

Removing And Installing Oxygen Sensors In Front Of Catalytic Converter

Tools

Tools:

Removing oxygen sensors in front of catalytic converter
Illustration shows oxygen sensors on the right side







- -1- Oxygen sensor in front of catalytic converter on the right side
- -2- Oxygen sensor behind catalytic converter on the right side

Oxygen sensor plug







- -1- Plug for sensor in front of catalytic converter with plastic clip (rectangular)
- -2- Plug for sensor behind catalytic converter (oval)

NOTE: Observe precautionary measures when using oxygen sensor.

Oxygen sensor, left side:
1. Remove air cleaner housing.
2. Separate the rectangular plug connection for the oxygen sensor in front of the catalytic converter in the left engine compartment -1-. To do this, first open the plastic securing clip.







3. Unclip the oxygen sensor wire in front of the catalytic converter from the wire retainer and the sheetmetal clips.

NOTE: Always expose oxygen sensor wire so that the wire can turn when unscrewing the sensor.

4. Undo and unscrew oxygen sensor with a spanner or an open ring wrench (a/f 22).

Oxygen sensor, right side:
1. Remove air cleaner housing.
2. Separate the rectangular plug connection for the oxygen sensor in front of the catalytic converter -1-. To do this, first open the plastic securing clip.







3. Unclip the oxygen sensor wire in front of the catalytic converter from the wire guide and the sheetmetal clips.

NOTE: Always expose oxygen sensor wire so that the wire can turn when unscrewing the sensor.

4. Undo and unscrew oxygen sensor with a spanner or an open ring wrench (a/f 22).

Installing oxygen sensors in front of catalytic converter

- The oxygen sensor is installed in reverse sequence.

NOTE: Always expose oxygen sensor wire so that the wire can turn when screwing in the sensor.

1. Position the oxygen sensor by hand and screw in as far as possible.
2. Tighten oxygen sensor with conventional open ring wrench Hazet 4681-1 and torque wrench.
Oxygen sensor in front of catalytic converter on left side







Oxygen sensor in front of catalytic converter on right side







Tightening torque: 55 ± 5 Nm (41 ± 4.0 ftlb.)

3. Lay oxygen sensor wire and fix in the sheetmetal clips and wire retainers on the left and right.
4. Close rectangular plug connections and secure with plastic clip.
5. Install the air cleaner housing again.