For 1990-2009 cars

#### Tools Required

J 39194-B Heated Oxygen Sensor Wrench

### Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Disconnect the pre (1) and post (4) heated oxygen (HO2S) sensor electrical connectors.
3. Remove the muffler pipe flange bolts (1).
4. Remove the exhaust manifold flange nuts.
5. Remove the catalytic converter support bracket bolt(s) (1).
6. Remove the catalytic converter(s) from the vehicle.
7. Remove the exhaust manifold flange gasket.
8. Use J 39194-B to remove the heated oxygen sensors.

### Installation Procedure

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

1. Use J 39194-B to install the heated oxygen sensors.

Tighten
Tighten the heated oxygen sensor to 42 N·m (31 lb ft).

2. Install the exhaust manifold flange gasket.
3. Install the catalytic converter(s) to the vehicle.
4. Install the catalytic converter support bracket bolt(s) (1).

Tighten
Tighten the catalytic converter support bracket bolt(s) (1) to 20 N·m (15 lb ft).

5. Install the exhaust manifold flange nuts.

Tighten
Tighten the exhaust manifold flange nuts to 25 N·m (18 lb ft).

6. Install the muffler pipe flange bolts (1).

Tighten
Tighten the muffler pipe flange bolts (1) to 40 N·m (30 lb ft).

7. Connect the pre (1) and post (4) heated oxygen (HO2S) sensor electrical connectors.
8. Inspect the exhaust system clearances.
9. Lower the vehicle.
10. Inspect the exhaust system for leaks.