Dorman 579-012 Fuel Tank Sending Unit Lock Ring

Fuel Tank Sending Unit Lock Ring for Chrysler Minivans

Dorman 579-012 is a metal fuel tank sending unit lock ring made for secure retention of the fuel pump assembly at the tank opening. It is recommended for replacement any time the sending unit is serviced, helping restore a proper seal and stable mounting on supported Dodge and Plymouth applications.

• Metal construction for durable service
• Inside diameter: 1.875 in
• Outside diameter: 4.25 in
• Lock ring diameter: 4 in
• Gasket or seal included
• Package contents: fuel pump lock ring

Detailed Application and Fitment

This Dorman fuel tank sending unit lock ring, part number 579-012, is used to retain the fuel pump/sending unit assembly in the tank opening on select Dodge Neon, Plymouth Neon, Dodge Caravan, Dodge Grand Caravan, Plymouth Voyager, and Plymouth Grand Voyager models. It is a direct-fit service part for vehicles with the listed tank configurations, including 1996 Dodge Neon and 1996 Plymouth Neon with metal tank notes, plus 1988-1995 Dodge Caravan, 1988-1995 Dodge Grand Caravan, 1988-1995 Plymouth Voyager, 1988-1995 Plymouth Grand Voyager, and 1995 Dodge Neon and 1995 Plymouth Neon.

This part cross-references Spectra Premium LO12 for the same application.

What This Part Helps Address

• Loose or damaged fuel pump lock ring at the tank opening
• Fuel odor caused by an improper seal at the sending unit flange
• Poor retention of the fuel pump assembly after service
• Corrosion or wear on the original metal retaining ring
• Repeat service issues when the lock ring is reused

Installation Notes and Tips

Inspect the tank flange, seal surface, and gasket area before installation. Replace the lock ring whenever the sending unit is serviced, and confirm the ring seats evenly around the opening before returning the vehicle to service. Verify the tank style and application notes for your Dodge Neon, Plymouth Neon, or Chrysler minivan before ordering.

Quality Assurance

Dorman manufactures this lock ring from metal for reliable service in fuel system repairs. The included seal supports proper reassembly of the sending unit interface, and the part is built for the listed OE-style applications. Part number 579-012 is intended for service use on the confirmed fitment vehicles.