Hi Wesley, I'm glad to assist you. Please use our vehicle selector located at the top of the page. Make sure to enter the exact year, model, submodel, and engine size of your vehicle. Our website will tell you automatically if the part you're looking for will be a guaranteed fit. You can also browse down at the vehicle fitment information section to see more details on the application. I hope this helps and happy shopping.

Hi Steve, I'm pleased to assist you. No. This part does not fit the 2003 Ford Explorer. Upon checking, we only have the 3-cat set-up for the Federal emissions. Check the Vehicle Emission Control Information sticker usually found underneath the hood to check if it matches the emission control specifications. Let me provide you with the link for direct-fit cats for the vehicle. Click on the link below to see, choose, and order at discounted prices while supplies last. I hope this is helpful. Enjoy shopping at Carparts.com! https://www.carparts.com/search?q=catalytic_converter&itemsperpage=15&refinements[productFit]=Direct_Fit&vehicle[year]=2003&vehicle[make]=Ford&vehicle[model]=Explorer&can=CPGG4850

Hi, This item fits both 4x4 and RWD 2004-2005 Ford Explorer with 2 converters. Please check the emission label sticker usually located underneath the hood for fitment reference. Should you need further assistance, feel free to call us at 1-866-529-0412.