Nubira SX Hatchback L4-2.0L DOHC D-TEC MFI (1999)
Oxygen Sensor: Service and Repair
Oxygen Sensor (02S 1)
REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
NOTE: The oxygen sensor (O2S 1) uses a permanently attached pigtail and connector. This pigtail should not be removed from the O2S 1.
Damage or removal of the pigtail or the connector could affect proper operation of the O2S 1. Take care when handling the O2S 1. Do not drop or
damage the O2S 1.
2. Disconnect the O2S 1 connector.
NOTE: The oxygen sensor may be difficult to remove when the engine temperature is below 48 °C (118 °F). Excessive force may damage the
threads in the exhaust manifold.
3. Carefully remove the O2S 1 from the exhaust manifold.
INSTALLATION PROCEDURE
IMPORTANT: A special anti-seize compound is used on the O2S 1 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 service sensors will already have the compound applied to
the threads. If a sensor is removed from any engine and if for any reason it is to be reinstalled, the threads must have anti-seize compound applied before
reinstallation.
1. Coat the threads of the O2S 1 with an anti-seize compound, if needed.
