Dorman 579-202 Fuel Tank Lock Ring

Fuel Tank Lock Ring for OE-Style Service

This Dorman fuel tank lock ring is a direct-match replacement for servicing the fuel sending unit and tank module. Built from durable plastic and rubber materials, it helps restore a secure seal and proper retention at the tank opening.

• Direct replacement fuel tank lock ring for OE-style fitment
• Made from plastic and rubber for dependable service
• Gray finish
• Includes a gasket or seal for the tank opening
• Designed for a secure fit during sending unit service
• Part number 579-202 for easy identification

Detailed Product Information

Dorman 579-202 is a fuel tank lock ring designed to match the original part used on select Ford, Lincoln, and Mercury applications. It measures 6.05 inches in lock ring diameter, with a 5-inch inside diameter, 6.625-inch outside diameter, and 0.12-inch thickness and rim width. The included O-ring and seal support a proper interface at the fuel tank opening when the sending unit is removed or serviced. This part cross-references Ford OE number F87Z9A307BA for the same application.

Compatible With 1998-2003 Ford Ranger, 2002-2005 Ford Explorer Sport Trac, 2002-2004 Ford Explorer, 2002-2003 Ford Explorer Sport, 2002-2004 Mercury Mountaineer, 2003-2005 Lincoln Aviator, 2003-2004 Ford Expedition, and 2003-2004 Lincoln Navigator. For buyers searching for a Ford Ranger fuel tank lock ring, Explorer sending unit lock ring, or Lincoln Navigator fuel module retaining ring, this part number 579-202 is the direct-match option to verify against the original hardware.

Common Repair Uses

• Fuel sending unit service that requires removal of the tank retaining ring
• Replacement of a worn, cracked, or distorted lock ring
• Repair of a seal issue at the fuel tank module opening
• Restoration of proper retention after fuel pump or sender work
• OE-number verification when matching F87Z9A307BA

Installation Notes and Tips

Inspect the tank flange, sender module, and sealing surface before installation. Clean away debris and confirm the ring seats evenly before tightening to avoid leaks or uneven retention. Verify application by year, make, and model before ordering, especially on Ford Ranger, Ford Explorer, and Lincoln Navigator fuel system repairs. Use the original part as a reference when comparing diameter and seal style.

Quality Assurance

Dorman manufactures this lock ring as a direct replacement for original equipment service, using durable materials for reliable fit and function. Part number 579-202 is built to match the original application and support consistent fuel tank service on the listed vehicles.