How do i replace the O2 sensors in my 1997 lexus ES300?

Question

Its so expensive to get done and am hoping for a little help with where they are located. thanks

Answer 1

Typically there is one located in each of the exhaust manifolds and one located after the catalytic converter, simply follow the exhaust manifold to the exhaust pipe until you find them.

The O2 sensors are not cheap as parts. Typically running $150 each. They aren't hard to replace if they haven't siezed in the exhaust manifold.

Answer 2

Are you sure the O2 sensors need replacement? If so then follow the exhaust pipe to the sensors. They are a spark plug like devise screwed into the exhaust pipe ahead of the catalytic converter. First unplug the electrical connection then unscrew the O2 sensor. sometimes you need a special socket to do this, but unless badly corroded they will come out as Long as you can get a box end wrench over the wire. Be sure to use the special lube on the replacement part or if already applied, do not wipe off.
The part is expensive, about $50 each from a national auto parts store.

Answer 3

Why? Check engine light? Someone tell you need all of them? If so find another place to take it too. All O2's sensors hardly ever fail at the same time.

They are all located on the exhaust manifolds and also further down on the exhaust pipe after the catalytic converter. They look like spark plugs with wires coming out of the end.

The expense is not in the labor, the parts are where the money is. If you use anything but dealer parts you will be wasting your money.

Answer 4

There may be 2 oxygen sensors. Some vehicles have one at the exhaust manifold and one near the catalytic converter. Try disconnecting the negative terminal on your battery for 2 minutes, this will reset the code. If the code still shows up, take back to Autozone, it could be something completely different.

Answer 5

1997 Es300