Please check notes in each part listing to ensure the Fuel Tank Cap is correct for your 1999 MERCURY COUGAR with a 2.0L 1989cc 121 engine. GATES, STANT, & MOTORCRAFT are competing brands, and each brand's Fuel Tank Cap may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Fuel Tank Cap fits only certain 1999 MERCURY COUGAR models.

Clicking a "More Info" link will display a picture and/or other details about that Fuel Tank Cap in a separate window (you may need to turn off your pop-up-blocking software for this to work).

After choosing a Fuel Tank Cap, 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 on "Find More Parts", to find more Fuel/Air parts, other MERCURY COUGAR parts, or parts for a different vehicle. Please try our Interactive Catalog (click red Start button above) for faster searching. Both catalogs use the same shopping cart, so any auto parts you've already chosen for your 1999 MERCURY will not be lost if you switch.