Dorman 579-147 Fuel Tank Lock Ring

Dorman Fuel Tank Lock Ring 579-147

Dorman 579-147 is a direct-match fuel tank lock ring for servicing the fuel sending unit and tank module. Built from durable plastic with a rubber O-ring seal, it is made for a secure fit and reliable service on select Ford and Lincoln applications.

Key Features

• Direct replacement fuel tank lock ring for OE-style fitment
• Durable plastic construction with rubber seal
• Includes gasket or seal for proper tank sealing
• Lock ring diameter: 5.875 in
• Color: white
• Cross-reference part numbers include LO159 and XW4Z9A307BA

Detailed Description

This fuel tank lock ring is designed for vehicles that require secure retention of the fuel sending unit during service. Dorman 579-147 matches the original part form and dimensions, including an inside diameter of 4.95 in, outside diameter of 6.5 in, and thickness of 0.12 in. It is a practical replacement when servicing the fuel tank assembly on Ford Freestar, Ford Thunderbird, Lincoln LS, Ford Escape, Ford Focus, and Ford Windstar models. The part number 579-147 is commonly searched for fuel tank lock ring replacement on these applications.

Vehicle Fitment

• Fits 2004-2005 Ford Freestar, N/A
• Fits 2002-2005 Ford Thunderbird, N/A
• Fits 2000-2005 Lincoln LS, N/A
• Fits 2001-2004 Ford Escape, N/A
• Fits 2000-2004 Ford Focus, N/A
• Fits 1999-2003 Ford Windstar, N/A

Common Repair Uses

• Fuel tank lock ring replacement during sending unit service
• Restoring a secure seal at the fuel tank opening
• Replacing a worn, cracked, or distorted retaining ring
• Addressing fuel odor concerns caused by a poor tank seal
• Correcting fitment issues after fuel module removal

Installation Notes and Tips

Inspect the tank flange and sealing surface before installation. Replace the O-ring seal whenever the sending unit is serviced, and confirm the ring seats evenly before final assembly. Verify application details for your Ford Escape, Ford Focus, or Lincoln LS before installation to ensure the correct fuel tank lock ring is selected.

Quality Assurance

Dorman manufactures this replacement ring as a direct match to the original part for the listed applications. The design uses durable materials and OE-style dimensions to support a secure, service-ready fit on compatible Ford and Lincoln vehicles. Part number 579-147 is built for dependable replacement use.