Does anyone know where the 02 sensors are both upstream and downstream or can they guide me to a map. Autozone says upstream is located before the CT converter and downstream after the CT converter. I want to change them both.

A map with instructions would be great. I saw some dude on Youtube who removed center console, removed passengerside chair, lifted carper to access but he did not have an RX 300.

 

https://www.clublexus.com/forums/rx-...el-sensor.html

https://www.clublexus.com/forums/rx-...sor-2-diy.html

I wouldn't bother with the downstream one unless you are getting a code. It's more of an idiot light sensor than a smart one, It does not really change how the car runs.

 

OK. If I move to VA I'm thinking I may fail emissions. The car runs well and funny b/c my mechanic said don't bother either...today he said it so your response is interesting and in good timing. BUT I think I may fail emissions. VSC and and check engine light is on. I have not found out which sensor it actually is up or downstream.

 

Buy this: read the codes (if there are several, clear them and read the first one that pops up) report back. Should not be too hard to figure it out.