Installation - Downstream 1/2 4 Cylinder

The O2S are located in the side of the catalytic converter. See Figure.

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. Install the O2S. Tighten to 28 N.m (20 ft. lbs.) torque.
3. Connect the O2S wire connector.
4. Lower the vehicle.
5. Install the negative battery cable.