Sensor-Oxygen 1/1,2/1 - 2.7L

Fig 1: Identifying Front O2 Sensors - 2.7

Courtesy of CHRYSLER LLC

Fig 2: Identifying Rear O2 Sensors - 2.7

Courtesy of CHRYSLER LLC

The engine uses two heated oxygen sensors, one in each exhaust manifold.

1. After removing the sensor, the exhaust manifold threads must be cleaned with an 18 mm X 1.5 + 6E tap. If reusing the original 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.
2. Use Special tool #8439 to install oxygen sensor. Tighten the sensor to 41 N.m (30 ft. lbs.).
3. Connect the heated oxygen sensor electrical connector.
4. Install the negative battery cable.