1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.

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

Caution: Refer to Excessive Force and Oxygen Sensor Caution in the Preface section.

2. Disconnect the bank 1, oxygen sensor 1 (1) electrical connector, from the engine wiring harness electrical connector.
3. Remove the bank 1, oxygen sensor 1 (1) from the exhaust manifold.

Note: Use special anti-seize compound on the heated oxygen sensor threads. The compound consists of graphite suspended in fluid and glass beads. The graphite burns away, but the glass beads remain, making the sensor easier to remove. New or service sensors already have the compound applied to the threads. If you remove an oxygen sensor and if for any reason you must reinstall the same oxygen sensor, apply the anti-seize compound to the threads before reinstallation.

1. Coat the threads of the heated oxygen sensor with the anti-seize compound P/N 5613695, or the equivalent if necessary.

Caution: Refer to Fastener Caution in the Preface section.

2. Install the heated oxygen sensor (1).

Tighten
Tighten the HO2S to 41 N·m (30 lb ft).

3. Reconnect the bank 1, oxygen sensor (4), electrical connector to the engine wiring harness electrical connector.
4. Lower the vehicle.