Before buying, Please click the "amazonconfirmedfit" to check (Make, model, year, engine, Note,The engine and Note in particular) at the top of the link to see if your car can be used. 1 Year Unlimited Mileage Quality Guarantee; "B1S1"="Bank1 Sensor1"，"B2S1"="Bank2 Sensor1" [Upstream(B1S1 or B2S1) Replacement parts]: Fit 2000-2001 Lexus ES300 V6 3.0L; Fit 2000-2004 Toyota Avalon V6 3.0L; Fit 2001-2003 Toyota Sienna V6 3.0L;