Dorman 579-200 Fuel Tank Lock Ring

Dorman 579-200 Fuel Tank Lock Ring

Dorman 579-200 is a direct replacement fuel tank lock ring for servicing the fuel sending unit. Built from steel and rubber with a black finish, it is made for a secure fit and dependable service on Chrysler Voyager, Town & Country, Dodge Caravan, and Grand Caravan applications.

Key Features

• Direct-match fuel tank lock ring for sending unit service
• Steel and rubber construction for durable retention
• Black finish
• Inside diameter: 4.46 in
• Outside diameter: 6.75 in
• Lock ring diameter: 5.715 in
• Thickness and rim width: 0.081 in
• Gasket or seal included

Product Details

This Dorman fuel tank lock ring is a recommended replacement whenever the sending unit is serviced. It matches the original part form and dimensions for a secure installation at the fuel tank opening. The included seal helps support a proper interface during fuel system service, and the steel construction adds strength where the ring must hold the assembly in place. Part number 579-200 is also a direct reference for service lookups and ordering.

This part cross-references Chrysler 4809682AA and Spectra Premium LO178 for the same application.

What It Helps Solve

• Loose or damaged fuel tank sending unit retention
• Fuel tank service issues caused by a worn lock ring
• Seal concerns at the sending unit opening
• Replacement needs after fuel pump or sender service
• Fitment-related repair work on Chrysler Voyager, Town & Country, Dodge Caravan, and Grand Caravan

Installation Notes and Tips

• Verify the tank opening and sender flange match the listed dimensions before installation.
• Inspect the sealing surface and replace any damaged components during fuel system service.
• Use proper fuel system service procedures and follow vehicle-specific repair instructions.
• Confirm application by model year before ordering; Dorman 579-200 is listed for 2004-2008 Chrysler Voyager, 2004-2007 Chrysler Town & Country, 2004-2007 Dodge Caravan, and 2004 Dodge Grand Caravan.

Quality Assurance

Dorman manufactures this lock ring as a direct replacement part for OE-style fit and serviceability. Part number 579-200 is built to match the original application requirements for Chrysler and Dodge fuel tank service.