One Year Unlimited Mileage Quality Guarantee Fit BMW 325CI 2001-2002 2.5L; Fit BMW 325I 2001-2002 2.5L; Fit BMW 330CI 2001-2002 3.0L; Fit BMW 330I 2001-2002 3.0L; Fit BMW 525I 2001-2002 2.5L; Fit BMW 530I 2001-2002 3.0L; Fit BMW Z3 2001-2002 2.5L 3.0L; Fit BMW X5 2001-2005 325XI 2.5L; Fit BMW 330XI 2001-2005 3.0L; Fit BMW X5 2001-2006 3.0L; Fit BMW Z4 2003-2005 2.5L 3.0L; Fit BMW X3 2004-2005 2.5L 3.0L; Fit BMW 323CI 2000 2.5L; Fit BMW 328CI 2000 2.5L; Installation: 2pcs Upstream + 2pcs Downstream Before buying, check the “Select Your Vehicle” check (brand, model, year, engine, Note,The engine and Note in particular) at the top of the link to see if your car can be used.