Notice: The Heated Oxygen Sensor (HO2S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor.

Notice: The oxygen sensor may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage threads in the exhaust manifold or the exhaust pipe.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.



2. Disconnect the electrical connector (1) releasing locking tab.
3. Carefully back out the oxygen sensor (2) from the exhaust manifold (3).

Important: Use a special anti-seize compound on the oxygen sensor threads. The 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 service sensors already have the compound applied to the threads. If you remove a sensor from an engine and if for any reason you reinstall the sensor, apply an anti-seize compound to the threads before reinstallation.

1. Coat the threads of the oxygen sensor with an anti-seize compound P/N 5613695, or the equivalent, if necessary.
2. Install the sensor (2) to the exhaust manifold (3).

Tighten
Tighten the sensor to 41 N·m (30 lb ft).

3. Connect the electrical connector (1).
4. Connect the negative battery cable.