Grand Cherokee 4WD V8-4.7L (2003)
Fig. 34 Oxygen Sensor Locations - 4.7L V-8 Engine
WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER(S) BECOME VERY HOT DURING
ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR.
1. Raise and support vehicle.
2. Disconnect O2S pigtail harness from main wiring harness.
3. If equipped, disconnect sensor wire harness mounting clips from engine or body.
CAUTION: When disconnecting sensor electrical connector, do not pull directly on wire going into sensor.
4. Remove O2S sensor with an oxygen sensor removal and installation tool.
INSTALLATION
Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal. DO NOT add any additional anti-seize compound to
threads of a new oxygen sensor.
1. Install O2S sensor. Tighten to 30 Nm (22 ft. lbs.) torque.
2. Connect O2S sensor wire connector to main wiring harness.
3. If equipped, connect sensor wire harness mounting clips to engine or body When Equipped: The O2S pigtail harness must be clipped and/or bolted
back to their original positions on engine or body to prevent mechanical damage to wiring.
4. Lower vehicle.
