For 1990-2009 cars

### Removal Procedure

Caution: Refer to Safety Glasses Caution in the Preface section.

Caution: Refer to Vehicle Lifting Caution in the Preface section.

1. Ignition OFF.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Disconnect the heated oxygen sensor (HO2S) from the electrical connector retaining clip (1).
4. Disconnect the heated oxygen sensor (HO2S) electrical connector (2) from the harness connector on the transmission case.
5. Remove the catalytic converter. refer to Catalytic Converter Replacement - Right Side .

Notice: Refer to Heated Oxygen and Oxygen Sensor Notice in the Preface section.

6. Remove the HO2S (1) from the catalytic converter.

### Installation Procedure

Notice: Refer to Component Fastener Tightening Notice in the Preface section.

Important: New oxygen sensors should have a special anti-seize compound already applied to the sensor threads. If you are installing the original sensor, apply an approved anti-seize compound to the sensor threads.

1. Install the HO2S to the catalytic converter.

Tighten
Tighten the HO2S to 40 N·m (30 lb ft).

2. Install the catalytic converter to the vehicle. Refer to Catalytic Converter Replacement - Right Side .
3. Connect the heated oxygen sensor (HO2S) electrical connector (2) to the harness connector on the transmission case.
4. Connect the heated oxygen sensor (HO2S) to the electrical connector retaining clip (1).
5. Lower the vehicle.