Many auto parts companies offer online consultation for finding the right replacement fuel door to fit a variety of cars. Companies like Auto Zone have online search databases that can automatically display all of the compatible fuel doors available for a given car based on its year, make and model.
Auto Parts Warehouse is a helpful resource for finding a replacement auto fuel door that is identical to one that has been lost. This company also offers consultation on parts purchases via telephone. Auto Parts Warehouse also offers the perk of free shipping to customers with orders totalling $50 or more, as of July 2015.
Meanwhile, Auto Zone and similar companies are unlikely to carry an identical fuel door issued by a car's original manufacturer but do have a vast array of replacement parts in stock from aftermarket manufacturers. They are a fine solution for a replacement fuel door if simply getting one that fits is the top priority.
Having a fuel door that is compatible in terms of shape with a car's existing fuel door space is an important matter from the standpoint of safety. If there are openings wide enough to allow nearby moisture inside, this moisture can reach the fuel supply, disrupt its chemical composition, and consequently, affect the car's performance.