Dorman 579-201 Fuel Tank Lock Ring

Fuel Tank Lock Ring for Nissan and INFINITI

Dorman 579-201 is a direct-match fuel tank lock ring for servicing the fuel sending unit. Built from durable plastic and rubber materials, it provides a secure fit and includes an O-ring seal for a proper tank-to-sending-unit interface.

Key Features

• Direct replacement fuel tank lock ring for OE-style fitment
• Made from black plastic and rubber for dependable service
• Includes an O-ring seal for the fuel tank opening
• Inside diameter: 4.25 in; outside diameter: 5.675 in
• Lock ring diameter: 5.15 in; thickness and rim width: 0.16 in
• Cross-references Spectra Premium LO182 and OE part number 1734250J00

Detailed Description

This Dorman fuel tank lock ring, part number 579-201, is a direct replacement for the original retaining ring used when servicing the fuel sending unit. It is designed for a secure fit and is manufactured from durable materials to support reliable sealing at the tank opening. The black plastic and rubber construction, along with the included O-ring, helps restore the connection between the fuel tank and sending unit on select Nissan and INFINITI applications.

Compatible With 1991-1996 INFINITI G20, 1993-2003 Nissan Altima, and 1995-1998 Nissan 240SX. This part number 579-201 is commonly searched for fuel tank lock ring replacement on Nissan Altima, Nissan 240SX, and INFINITI G20 fuel system service jobs.

Common Issues This Part Can Address

• Damaged or worn fuel tank lock ring during sending unit service
• Improper sealing at the fuel tank opening
• Corrosion-related replacement needs on the retaining ring
• Fitment issues caused by a distorted or cracked original ring
• Fuel system service requiring a direct-match retaining ring

Installation Notes and Tips

Install the lock ring during fuel sending unit service and confirm the O-ring is seated correctly before final assembly. Clean the tank flange and mating surfaces before installation to help achieve a secure seal. Verify vehicle application by year and model before ordering, especially for Nissan Altima, Nissan 240SX, and INFINITI G20 service.

Quality Assurance

Dorman manufactures this replacement lock ring as a direct match to the original part for the listed applications. Part number 579-201 is built to support a secure fit and consistent service performance in fuel tank repair work.