For 1990-2009 cars

### Removal Procedure

1. Open the hood.
2. Remove the connector position assurance (CPA) retainer.
3. Disconnect the position 2 HO2S electrical connector (4) from the engine wiring harness electrical connector (2).
4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

Important: The HO2S uses a permanently attached pigtail and connector. This pigtail should not be removed from the sensor. Damage or removal of the pigtail or connector will affect proper operation of the sensor.

5. Remove the HO2S. Refer to Heated Oxygen Sensor 1 Replacement .
6. Remove the catalytic converter to muffler nuts.
7. Have an assistant support the muffler assembly.
8. Separate the muffler insulators (2) from the hangers (1).
9. With the aid of an assistant, remove the muffler assembly.

### Installation Procedure

1. With the aid of an assistant, position the muffler assembly.
2. Install the muffler insulators (2) onto the hangers (1).

Notice: Refer to Fastener Notice in the Preface section.

3. Install the catalytic converter to muffler nuts.

Tighten
Tighten the nuts to 17 N·m (13 lb ft).

4. Install the HO2S. Refer to Heated Oxygen Sensor 1 Replacement .
5. Lower the vehicle.
6. Connect the position 2 HO2S electrical connector (4) to the engine wiring harness electrical connector (2).
7. Install the CPA retainer.
8. Close the hood.