Dorman 579-071 Fuel Tank Sending Unit Lock Ring

Fuel Tank Sending Unit Lock Ring for Toyota and Geo

Dorman 579-071 is a fuel tank sending unit lock ring made to secure the fuel pump assembly at the tank opening. Built from durable rubber and supplied with a gasket or seal, it supports a tight, service-ready seal when the sending unit is removed and reinstalled.

Key Features

• Fuel tank sending unit lock ring for service replacement
• Rubber construction for reliable sealing performance
• Inside diameter: 3.93 in; outside diameter: 5.11 in
• Includes gasket or seal for the fuel pump assembly interface
• Mounting hardware included
• Compatible With 1993-1997 Geo Prizm, fuel pump, 5 in. I.D.
• Compatible With 1993-1997 Toyota Corolla, fuel pump

Detailed Description

When servicing the fuel pump or sending unit, the lock ring is a critical retaining component that keeps the assembly secured to the tank opening. Dorman 579-071 is engineered for 1993-1997 Toyota Corolla and 1993-1997 Geo Prizm fuel pump applications, with dimensions that match the listed tank opening requirements. This part cross-references Spectra Premium LO71 for the same application.

Common Repair Uses

• Replacing a worn or damaged fuel pump lock ring
• Restoring a secure hold on the sending unit after service
• Addressing fuel odor caused by a poor tank seal at the pump opening
• Correcting fitment issues during fuel pump or sender replacement
• Replacing a ring that no longer seats evenly on the tank flange

Installation Notes and Tips

Inspect the tank flange, seal surface, and retaining groove before installation. Clean away corrosion, debris, and old seal material so the ring can seat evenly. Verify the 5.11 in. lock ring diameter and the 3.93 in. inside diameter against the vehicle tank opening before final assembly. This part is used on fuel pump service for 1993-1997 Toyota Corolla and 1993-1997 Geo Prizm applications.

Quality Assurance

Dorman manufactures this lock ring from durable materials for dependable service during fuel system repair. Part number 579-071 is built to support proper retention of the fuel pump assembly after sending unit service.