Oxygen Sensors, G39, G131, G285 and G288

Oxygen Sensors, G39, G131, G285 and G288

Special tools, testers and auxiliary items required

• Ring spanner 7-piece set for oxygen sensor (3337)

Removing

• All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.

- Loosen quick-release fasteners - 2 - and remove rear noise insulation.





- Remove bracket from subframe - arrow -.





- Remove affected oxygen sensor electrical connector from bracket on transmission.

1 Brown connector for Oxygen Sensor (O2S) 4 Behind Three Way Catalytic Converter (TWC) (G288)
2 Brown connector for Heated Oxygen Sensor (HO2S) 3 (G285) (in front of catalytic converter)
3 Black connector fro Heated Oxygen Sensor (HO2S) (G39) (in front of catalytic converter)
4 Black connector for Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131)

- Disconnect affected electrical connector and free up electrical wiring.

- Remove affected oxygen sensor using tool from Ring spanner 7-piece set for oxygen sensor (3337).





1. Heated Oxygen Sensor (HO2S) 3 (G285) (in front of catalytic converter)

2. Oxygen Sensor (O2S) 4 Behind Three Way Catalytic Converter (TWC) (G288)

3. Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131)

4. Heated Oxygen Sensor (HO2S) (G39)(before catalytic converter)

Installing

Installation is in reverse order of removal, note the following:

• New oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body.

• For a used oxygen sensor, only coat threads with hot bolt paste. This paste must not come into contact with sensor slots.

• Electrical wire of oxygen sensor must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.

Tightening specifications. Refer to => [ Oxygen Sensors Assembly Overview ] Oxygen Sensors Assembly Overview