For 1990-2009 cars

#### Special Tools

SA9603E /KM-6179 Oxygen Sensor Wrench Remover/Installer

### Removal Procedure

Notice: The heated oxygen sensors each use a permanently attached pigtail and connector. Do not remove the pigtail from the heated oxygen sensor. Damage or removal of the pigtail or the connector affects proper operation of the heated oxygen sensor. Handle the oxygen sensor carefully. Do not drop the oxygen sensor. Keep the in-line connector and the louvered end free of grease, dirt, or other contaminants. Do not use cleaning solvents of any type. Do not repair the wiring, the connector, or the terminals. Replace the oxygen sensor if the pigtail wiring, the terminals, or the connector is damaged. Proper oxygen sensor operation requires an external air reference. This external air reference is obtained by way of the oxygen sensor signal and heater wires. Any attempt to repair the wires, the connectors, or the terminals results in the obstruction of the air reference and degrades the oxygen sensor performance. A dropped oxygen sensor is a bad oxygen sensor.

Notice: The oxygen sensor may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage threads in the exhaust manifold or the exhaust pipe.

1. Disconnect the oxygen sensor wiring harness plug (3).
2. Disconnect the wiring harness (2).
3. Remove the oxygen sensor (1) from the front exhaust pipe with SA9603E /KM-6179 .

### Installation Procedure

Notice: Refer to Fastener Notice in the Preface section.

Important: When re-using the oxygen sensor, coat the thread of the oxygen sensor with assembly paste (white).

1. Install the oxygen sensor 2 in the front exhaust pipe using SA9603E /KM-6179 .

Tighten
Tighten to 40 N·m (30 lb ft).

2. Connect the wiring harness plug for the oxygen sensor.
3. Install the wiring harness.