Hi,
I just got a 2003 Lexus ES300 V6. It runs great but it failed emissions inspection. I was told that the O2 sensor B1 S1 needed to be replaced. After talking to a Lexus parts person, I became very confused.
Which O2 Sensor is B1 S1 and where is it located? My local mechanic told me to replace the one on the front manifold, but the parts guy told me that's B2. Although, the parts guy seemed confused and unsure.
Would someone be kind enough to point me in the right direction?
Thank you for your help.
