When an oxygen sensor fails on your Toyota Avalon, the gas mileage of your car will noticeably decline. The Avalon oxygen sensor regulates the amount of fuel your car burns, and when it fails your Toyota burns more fuel than necessary.
Locate the Avalon's two oxygen sensors on either side of the catalytic converter on the exhaust manifold. The Avalon's oxygen sensors look like a gold spark plug with a wire coming off the end.
Remove the Toyota Avalon's wiring harness from the end of the both oxygen sensors using your fingers. Do not damage the end of the Avalon's wiring harness.
Take out both of the Avalon's oxygen sensors using the oxygen sensor wrench.
Apply the anti-seize compound to the Avalon's two new oxygen sensors threads.
Install the Toyota Avalon's two new oxygen sensors using the oxygen sensor wrench. Re-attach the wiring harness to the Avalon's oxygen sensors using your fingers.
