Thread: Oxygen Sensor Replacement

Quote: Originally Posted by Lexiss_sc430 O2 sensors go bad.... every car experiences it. as for our SC's the rears are pretty easy to get to, you can probably get it done in 20-30 min if you know that you're doing. If that's true, I sure 'overpaid' at the dealer... charging me for 1 1/2 worth of labor. I'm told it's located behind the rear passenger seats and if it truly takes someone 20-30 mins to remove...

That’s laughable that they said its behind the back seats, the only thing being the back seats is the gas tank, rear axles, and mufflers. We have 2 sets of O2 sensors, one set upstream (before the catalytic converters) and one set down stream (right after the cats). Now the 1st set of sensors is located right on the headers, and the second ones are about a foot behind those. If you kneel and look about a foot behind the front wheel...

Quote: Originally Posted by Bon The CPO warranty is for internal engine components. These O2 sensors are part of the emissions system which is not covered past the original factory warranty. The exhaust system is also not covered. Can I change my answer? After carefully examining the Lexus CPS warranty it is an exclusionary bumper-to-bumper warranty. The exhaust and emissions systems are not specifically excluded so they are covered.

Quote: Originally Posted by Bon Can I change my answer? After carefully examining the Lexus CPS warranty it is an exclusionary bumper-to-bumper warranty. The exhaust and emissions systems are not specifically excluded so they are covered. Thanks Bon, can anyone cosign this? I love my mechanic but if Lexus can pay for this, they need to pay for it.

My O2 sensor was replaced on my '02 a year or two ago and it was covered by the Lexus extended warranty that I had.

First, try to locate where the O2 sensors are. That'll give you the difficulty level of how long it would take. Don't make the same mistake I did two days ago. I paid 45 bucks to replace the fusible link in the engine bay. I wish I did my search first. Good luck.

Back Seats are about 10 minutes, 10MM,13MM and 14MM wrenches if I remember. 8 bolts and then just two more if you want to remove the side panels. The image is thanks to Habious, he taught me and it was very easy.

My MIL just went off and I have read it is probably the oxygen sensor. And might as well replace both whlie you are at it. How do you turn off the MIL? And can any competant mechanic replace the oxygen sensors? Hate to get ripped off my lexus again. Mine is an '02 with 75k.

bigmalik- I have the CPO Warranty. The way I have always understood both the CPO and the ESP's (Platinum Warranty is the one I owned my my 02 SC, 3/75k no deductible) is that this WOULD be covered. I am not an expert by any means, but if I were in Vegas I would bet that you are covered. Don't take my word on it though, or Bon's...go to the dealer or call them yourself. It couldn't hurt. Based on the exclusionary coverage...

I had my O2 sensor replaced a few weeks ago on my 03. Lexus did not charge for the replacement of the 02 sensor nor billed the company that I purchased by third party extended warranty from. I took it for what it was and didn't want to raise any red flags by asking probing questions.