Dorman 579-203 Fuel Tank Lock Ring

Dorman 579-203 Fuel Tank Lock Ring

Dorman 579-203 is a direct-match fuel tank lock ring for servicing the fuel sending unit on compatible vehicles. Built from steel with a black finish, it provides the secure retention needed for a proper tank seal interface on 1998-2003 Dodge Durango applications.

Key Features

• Direct replacement fuel tank lock ring for OE-style fitment
• Steel construction for durable service
• Black finish
• Inside diameter: 4.915 in.
• Outside diameter: 7.75 in.
• Thickness and rim width: 0.105 in.
• Lock ring diameter: 6.625 in. / 5.925 in.
• Gasket or seal not included

Detailed Description

This fuel tank lock ring is made to match the original part dimensions and secure the sending unit in place during fuel system service. Dorman 579-203 is a practical replacement when the tank module is removed, helping restore the correct locking interface on Dodge Durango fuel tank assemblies. This part cross-references Spectra Premium LO173 for the same application.

What It Helps Address

• Loose or damaged fuel sending unit retaining ring
• Improper lock ring engagement during tank service
• Corrosion-related replacement needs on the original ring
• Fitment issues after fuel pump or sender replacement
• Restoring the correct retention hardware on a Dodge Durango fuel tank

Installation Notes and Tips

Fits 1998-2003 Dodge Durango, N/A. Verify tank opening dimensions and ring style before installation, and transfer or replace the seal as required since no gasket or seal is included. Clean the mating surfaces before seating the ring to help achieve proper engagement.

Quality Assurance

Manufactured from durable steel and built as a direct match to the original part, Dorman 579-203 is intended to provide reliable service in fuel tank applications. It also cross-references OE number 52102164 for reference during parts lookup.