10 months ago, I had numerous o2 and air/fuel sensors replaced on my 2000 RX300. I think that the total was 3 sensors. As I'm again having a code for an O2 sensor appearing, I'm wondering if they were ALL replaced. Are there more than 3?
Thanks in advance.

 

There are 3 total. Two in the manifolds and one at the converter. Were they replaced with OE parts or aftermarket?

 

how much are oem sensors anyway???

 

$110 on amazon.
Surprisingly enough the aftermarket sensors cost more than OEM.

 

If i change my ox sensors.... Does my mpg goes up???
(i don't have check engine light on)

 

If your cel is not ON dont mess with sensors. Keep your airfilter clean and inflate the tires to the right pressure. Good driving habits will make a difference too.

Salim

 

cool..........thanks for the advice!!

 

Haven't any idea, and I'm not sure my mechanic knows, either.
After looking at one of the Club's DIY posts, I'm not really convinced that they ever even changed the one that's now defective, as I see that it doesn't look as if the driver seat was ever removed to lift the rug, and there are no cuts in the rug to allow for access to the electric connection that is supposed to be there.

 

Price of sensors not nearly as significant as installation costs. If you DIY, then watch out for stripping manifold threads! These are often cooked in.