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emissions warranty is 6yr/70k miles... the O2 sensor should be covered no problem... its the sensor in the exhaust manifold, on the passenger side of the engine.
I just called lexus to find out about the O2 sensors it is part of the Basic warranty 4yrs/50k. I guess I will be paying for this. I fall in the year but not the miles 63k.
Don't know if I want to tackle this Lexus says 400.00 for the job.
I can get the Denso sensor for 97.00 each. Maybe I'll do that and put it in myself.