đ§ăApplicationsăOE# 234-4609 234-4046 Upstream Downstream Oxygen Sensor Replacement for Ford 1999 1998 Crown Victoria 2002 2001 2000 E-150 Van 2008-2007 Escape Mercury Mariner 02 Sensor. đ§ăAdvantageăMade of high-quality materials,strong durability,to ensure service life,oxygen sensor can improve engine performance and fuel economy,extend catalytic converter life. đ§ăCautionsăPls carefully check your vehicle year & make & model with the fitment of Amazon and our description.Pls compare your part with our pictures, it must be completely same.If you have any questions, please email us, we try to answer all email within 24 hours. đ§ăInstallationăSTEP1. Locate the oxygen sensor position and remove it with socket, STEP2. Compare the new sensor to the old sensor to ensure a proper installation, STEP3. Please clean the threaded port to en sure a proper seal of the new sensor,STEP4.Gently tighten the sensor in order to keep wire free from damage and avoid sensor leakage, STEP5,Reinstail the connecor,try to clear it if the car has diagnostic trouble codes. đ§ăWarrantyă1-Year Unlimited Miles Warranty. If the oxygen sensor does not fit your vehicle, we accept return. Please make the item clean and package in good condition. 2Pcs Upstream and Downstream O2 Sensor Oxygen Sensor Fit For Ford 1999 1998 Crown Victoria 2002 2001 2000 E-150 Van 2008-2007 Escape Mercury Mariner 02 Sensor 234-4609 234-4046