Dorman 579-033 Fuel Tank Sending Unit Lock Ring

Dorman 579-033 Fuel Tank Sending Unit Lock Ring

Dorman 579-033 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 select Toyota Corolla, Toyota Camry, and Lexus ES250 applications with sending unit service needs.

Key Features

• Fuel tank sending unit lock ring for secure retention of the fuel pump assembly
• Durable rubber construction for reliable service
• Gasket or seal included for service replacement
• Inside diameter: 3.25 in; outside diameter: 3.75 in
• Lock ring diameter: 2.25 in
• Compatible With 1988-1992 Toyota Corolla, sending unit
• Compatible With 1987-1991 Toyota Camry, sending unit
• Compatible With 1990-1991 Lexus ES250, sending unit

Detailed Description

When servicing the fuel sending unit, the lock ring is a critical retaining component that helps hold the fuel pump assembly in place at the tank. Dorman 579-033 is built from rubber and supplied with a gasket or seal to support a proper service replacement. This part cross-references Spectra Premium LO33 for the same application. For owners searching for a Toyota Corolla fuel tank sending unit lock ring, a Toyota Camry fuel pump lock ring, or a Lexus ES250 sending unit retaining ring, Dorman 579-033 matches the listed applications.

What It Helps Solve

• Loose or damaged fuel pump retaining ring at the tank opening
• Fuel sending unit service where the original lock ring is worn or distorted
• Seal-related concerns during fuel tank sender replacement
• Retention issues after fuel pump assembly removal and reinstallation
• Fitment needs for 1988-1992 Toyota Corolla, 1987-1991 Toyota Camry, and 1990-1991 Lexus ES250 sending unit service

Installation Notes and Tips

Inspect the tank flange and sender sealing surfaces before installation. Replace the lock ring whenever the sending unit is serviced, and verify the gasket or seal seats evenly before tightening. Confirm application details against the vehicle year, make, model, and sending unit configuration before installation. Dorman 579-033 is listed for sending unit service on the specified Toyota and Lexus models.

Quality Assurance

Dorman manufactures replacement hardware for fuel system service with application-specific fitment and durable materials. Part number 579-033 is cataloged for the listed Toyota Corolla, Toyota Camry, and Lexus ES250 applications.