For 1990-2009 cars only
Removal Procedure
- Disconnect the negative battery cable.
- Disconnect the electrical connector.
- Remove the rear heated oxygen sensor (HO2S2).
Warning: Refer to Battery Disconnect Warning in the Preface section.
Installation Procedure
- Coat the threads of the HO2S2 with an anti-seize compound, if needed.
- Install the HO2S2.
- Connect the electrical connector.
- Connect the negative battery cable.
Important: A special anti-seize compound is used on the oxygen sensor threads. This 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 serviced sensors will already have the compound applied to the threads. If a sensor is removed from any engine and is to be reinstalled, the threads must have an anti-seize compound applied before reinstallation.
Caution: Refer to Fastener Caution in the Preface section.
Tighten
Tighten the heated oxygen sensor to 42 N·m (31 lb ft).
