Two year, unlimited-mileage warranty. Guaranteed Exact Fit for easy installation Stock replacement K03 turbo - guaranteed to fit and perform exactly the same as OEM This is an exact-fit replacement turbocharger meant to replace the existing turbocharger on your vehicle. The turbocharger's job is to maintain the efficiency and proper operation of your engine. This is not an add-on turbocharger for a vehicle which wasn't equipped with a turbocharger. Please refer to the fitment dropdown on the listing, as well as the provided OE numbers below to make sure this is the correct part for your vehicle Designed, manufactured and tested to optimize performance and durability Fits Audi A4 and VW Passat 1.8T - DOES NOT FIT GOLF, JETTA OR AUDI TT! While those vehicles also use a similar 1.8L turbocharged engine, the mounting is completely different.