Please check notes in each part listing to ensure the Spindle Nut Retainer is correct for your 2003 MERCURY MOUNTAINEER with a 4.6L engine. Special restrictions like "California only" or "with sport package" may indicate a Spindle Nut Retainer fits only certain 2003 MERCURY MOUNTAINEER models.
Clicking a "More Info" link will display a picture and/or other details about that Spindle Nut Retainer in a separate window (you may need to turn off your pop-up-blocking software for this to work).
After choosing a Spindle Nut Retainer, click the "Add Part" button. Shipping costs will be shown on the Shopping Cart page. You may use your browser's Back button or click "Find More Parts" to find more Brake/Wheel Hub parts, other MERCURY MOUNTAINEER parts or parts for a different vehicle. Please try our Interactive Catalog (click link above) for faster searching. Both catalogs use the same shopping cart so any auto parts you've already chosen for your 2003 MERCURY will not be lost if you switch.