Dorman 579-127 Fuel Tank Lock Ring

Dorman 579-127 Fuel Tank Lock Ring

Dorman 579-127 is a direct replacement fuel tank lock ring for servicing the fuel sending unit or fuel pump module. Built from steel with a black finish, it is made for a secure, OE-style fit on supported Dodge, Jeep, Chrysler, and Ram applications.

Key Features

• Direct-match fuel tank lock ring for service work on the sending unit
• Steel construction for durable retention at the tank opening
• Black finish
• Inside diameter: 4.915 in; outside diameter: 7.75 in
• Thickness and rim width: 0.105 in
• Lock ring diameter: 6.625 in; 5.925 in
• No gasket or seal included
• Brand part number: 579-127

Detailed Description

This fuel tank lock ring is a direct replacement for the original retaining ring used to secure the fuel sending unit or pump module to the tank. Dorman 579-127 is manufactured from steel for reliable service and is recommended whenever the sending unit is removed during repair. It cross-references Spectra Premium LO154 and is also associated with OE part number 4721916AA for the same application. Common vehicle coverage includes Dodge Grand Caravan, Dodge Journey, Jeep Wrangler, Ram 1500, Ram 2500, and Ram 3500, along with additional Chrysler and Jeep applications.

What It Is Used For

• Replacing a damaged or corroded fuel tank lock ring
• Restoring secure retention of the fuel sending unit
• Addressing fuel odor concerns caused by a poor tank seal at the module opening
• Correcting service issues after pump or sender replacement
• Maintaining proper tank module clamping on supported Dodge, Jeep, Chrysler, and Ram vehicles

Installation Notes and Tips

Install the lock ring during fuel tank sender or pump service and verify the ring seats evenly before returning the vehicle to service. Because no gasket or seal is included, reuse or replace the seal as required by the repair. Confirm application details for your specific vehicle, including notes such as primary pump or 17-gallon tank where listed. Compatible With 2008-2020 Dodge Grand Caravan, 2009-2020 Dodge Journey, 2005-2020 Jeep Wrangler, and 2011-2020 Ram 1500 applications, among others in the listed fitment.

Quality Assurance

Dorman manufactures this lock ring as a direct replacement part built to match the original fit and function for the supported applications. The steel construction and OE-style dimensions support dependable service during fuel system repairs.