For 1990-2009 cars

#### Tools Required

SA9603E Oxygen Sensor Remover/Installer

### Removal Procedure

Caution: Refer to Battery Disconnect Caution in the Preface section.

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .

Important: The oxygen sensor uses a permanently attached pigtail and connector. This pigtail should not be removed from the oxygen sensor. Damage or removal of the pigtail or the connector affect the proper operation of the oxygen sensor. Take care when handing the oxygen sensor. Do not drop the oxygen sensor.

2. Disconnect the upper heated oxygen sensor connector at the back of the Bank 1 cylinder head.

Caution: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

3. Remove the exhaust front pipe. Refer to Front Pipe Replacement .
4. Remove the rear pup converter. Refer to Auxiliary Catalytic Converter Replacement .
5. Remove the rear exhaust manifold. Refer to Exhaust Manifold Replacement .
6. Using SA9603E , carefully remove the upper heated oxygen sensor from the rear exhaust manifold.

### Installation Procedure

Important: A special anti-seize compound is used on the oxygen sensor threads. This compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or serviced sensors will already have the compound applied to the threads. If a sensor is removed from any engine and is to be reinstalled, the threads must have an anti-seize compound applied before reinstallation.

1. Coat the threads of the oxygen sensor with anti-seize compound, if needed.

Notice: Refer to Fastener Notice in the Preface section.

Important: This pigtail should not be removed from the oxygen sensor. Damage or removal of the pigtail or the connector affect the proper operation of the oxygen sensor. Take care when handling the oxygen sensor. Do not drop the oxygen sensor.

2. Using SA9603E , install the upper heated oxygen sensor to the rear exhaust manifold.

Tighten
Tighten the heated oxygen sensor to 50 N·m (37 lb ft).

3. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .