Dorman 579-034 Fuel Tank Sending Unit Lock Ring

Dorman 579-034 Fuel Tank Sending Unit Lock Ring

Dorman 579-034 is a fuel tank sending unit lock ring used to secure the fuel pump assembly at the tank opening. It is a direct-fit service part for fuel tank repairs on select Toyota, Lexus, and Geo applications, including Corolla, RAV4, Camry, Tercel, Paseo, Prizm, 4Runner, and ES250 models.

Key Features

• Fuel tank sending unit lock ring for retaining the fuel pump assembly
• Rubber construction for durable service in fuel system applications
• Includes a gasket or seal for service replacement
• Inside diameter: 3.25 in; outside diameter: 3.75 in
• Lock ring diameter: 1.25 in
• Direct replacement for select Toyota Corolla fuel tank sending unit service and related applications

Detailed Description

This Dorman fuel tank sending unit lock ring is recommended whenever the sending unit is serviced. It helps hold the fuel pump assembly securely in place at the tank lock, supporting a proper seal at the fuel module opening. The rubber material and included seal make it a practical replacement for fuel system maintenance on vehicles such as the Toyota Corolla, Toyota RAV4, and Toyota Camry, as well as select Lexus ES250, Geo Prizm, Toyota Tercel, Toyota Paseo, and Toyota 4Runner applications. Part number 579-034 is also cross-referenced with Spectra Premium LO34 for the same application.

Common Problems This Part Helps Address

• Loose or damaged fuel pump retaining ring
• Fuel tank sending unit service after pump or sender replacement
• Seal wear at the fuel module opening
• Improper retention of the fuel pump assembly
• Fuel system service on select Toyota Corolla and Toyota RAV4 models

Installation Notes and Tips

• Inspect the tank opening and sealing surfaces before installation.
• Replace the lock ring during sending unit service to restore secure retention.
• Confirm vehicle application by year, make, and model before ordering.
• Use care during installation to avoid damaging the seal or tank flange.

Quality Assurance

Dorman manufactures replacement hardware for fuel system service with materials selected for reliable everyday use. Part number 579-034 is built as a service replacement for select applications where the sending unit lock ring must be renewed during repair.