Dorman 579-010 Fuel Tank Sending Unit Lock Ring

Dorman 579-010 Fuel Tank Sending Unit Lock Ring

Dorman 579-010 is a fuel tank sending unit lock ring and seal set for service work on Nissan and INFINITI fuel systems. It secures the fuel pump/sending unit assembly at the tank opening and uses durable rubber construction for a reliable seal during replacement service.

Key Features

• Fuel tank sending unit lock ring for secure retention of the pump/sending unit assembly
• Rubber construction for sealing performance at the tank opening
• Inside diameter: 4.39 in; outside diameter: 4.9 in
• Lock ring diameter: 4.25 in
• Mounting hardware included; gasket or seal included
• Compatible with Nissan Frontier, Altima, Pathfinder, Maxima, Sentra, 200SX, Pickup, D21, Pulsar NX, 300ZX, and INFINITI I30 applications listed below

Detailed Description

This Dorman fuel tank sending unit lock ring, part number 579-010, is recommended whenever the sending unit is serviced. It helps retain the fuel pump assembly at the tank lock and provides the sealing interface needed for proper fuel system service. The rubber material and listed dimensions support a precise service replacement for a range of Nissan and INFINITI models, including Nissan Frontier, Altima, Pathfinder, and Maxima applications.

This part cross-references Bosch 68203 for the same application.

What It Is Used For

• Replacing a worn or damaged fuel tank sending unit lock ring
• Restoring the seal at the fuel pump/sending unit opening
• Addressing fuel odor caused by a compromised tank seal
• Correcting service issues after fuel sender or pump removal
• Maintaining secure retention of the sending unit assembly

Installation Notes and Tips

• Verify tank opening diameter and lock ring diameter before installation.
• Inspect the mating surfaces for corrosion, debris, or damage before seating the seal.
• Use the listed fitment notes for seal-only applications on the specified Nissan and INFINITI vehicles.
• Confirm vehicle year and model match the fitment list before ordering.

Quality Assurance

Dorman supplies replacement hardware and sealing components for fuel system service, and this part is built from durable materials for dependable use. It is listed with direct fitment coverage for 1985-2004 Nissan and 1996 INFINITI applications shown below.

• Fits 1998-2004 Nissan Frontier, N/A, Seal Only
• Fits 1993-2001 Nissan Altima, N/A, Seal Only
• Fits 1987-2000 Nissan Pathfinder, N/A, Seal Only
• Fits 1985-1999 Nissan Maxima, N/A, Seal Only
• Fits 1987-1999 Nissan Sentra, N/A, Seal Only
• Fits 1995-1998 Nissan 200SX, N/A, Seal Only
• Fits 1985-1988 Nissan 200SX, N/A, Seal Only
• Fits 1985-1997 Nissan Pickup, N/A, Seal Only
• Fits 1996 INFINITI I30, N/A, Seal Only
• Fits 1990-1996 Nissan 300ZX, N/A, Seal Only
• Fits 1994 Nissan D21, N/A, Seal Only
• Fits 1987-1990 Nissan Pulsar NX, N/A, Seal Only