Oxygen Sensor - Installation

3.6L





The engine is equipped with four heated oxygen sensors:

- The right upstream oxygen sensor (1) is referred to as the 1/1 sensor.
- The right downstream oxygen sensor (4) is referred to as the 1/2 sensor.
- The left upstream oxygen sensor (3) is referred to as the 2/1 sensor.
- The left downstream oxygen sensor (2) is referred to as the 2/2 sensor.

1. If reinstalling the original oxygen sensor, coat the sensor threads with an anti-seize compound such as Loctite 771- 64 or equivalent. New sensors have compound on the threads and do not require an additional coating. Do Not add any additional anti-seize compound to the threads of a new oxygen sensor.
2. Install the oxygen sensor and tighten to:
- Right upstream oxygen sensor (1), 43 Nm (32 ft. lbs.).
- Right downstream oxygen sensor (4), 43 Nm (32 ft. lbs.).
- Left upstream oxygen sensor (3), 43 Nm (32 ft. lbs.).
- Left downstream oxygen sensor (2), 45 Nm (33 ft. lbs.).

CAUTION: Never apply any type of grease to the oxygen sensor electrical connector, or attempt any repair of the sensor wiring harness.

3. Connect the heated oxygen sensor electrical connector.
4. Lower the vehicle.
5. Connect the negative battery cable and tighten nut to 5 Nm (45 in. lbs.).