When an oxygen sensor fails on your 2002 Jaguar S-Type, the gas mileage of your car declines noticeably. The oxygen sensor regulates the amount of fuel your car burns, and when it fails your car burns more fuel than necessary. You can replace the oxygen sensors on your 2002 Jaguar S-Type yourself.
Locate the Jaguar's two oxygen sensors, which are on either side of the catalytic converter on the exhaust manifold. The Jaguar's two oxygen sensors resemble gold spark plugs that have an electrical wire attached to the end.
Remove the Jaguar's wiring harness from the back of the oxygen sensor by hand, making sure not to damage the end of Jaguar's wiring harness.
Use the oxygen sensor wrench to remove the Jaguar's two oxygen sensors from the exhaust manifold.
Apply the anti-seize compound to the threads of the Jaguar's two new oxygen sensors.
Install the Jaguar's two new oxygen sensors to the exhaust manifold using the oxygen sensor wrench. Use your fingers to attach the Jaguar's wiring harness to the ends of the two oxygen sensors.
Run the engine for about five minutes before beginning, because a warm oxygen sensor may be easier to remove.
Use caution around hot Jaguar exhaust parts