Dorman 577-501 Fuel Filler Neck Seal | Direct Replacement for Ford, Lincoln, Mercury

Product overview

The Dorman 577-501 fuel filler neck seal is designed to match the original seal in form and function on select Ford, Lincoln, and Mercury models. It’s crafted to withstand daily driving and fluctuating fuel system pressures, helping maintain a clean, tight seal around the filler neck and reduce the chance of fuel odors or seepage under normal operating conditions. This part is offered as a direct replacement when the original seal wears or fails, with fit described as purpose-built and reliable for the intended vehicles.

Key benefits

• Direct replacement that mirrors the original seal's fit and function, simplifying installation.
• Restores sealing performance when the prior seal has degraded.
• Durable construction designed for steady, long-term operation.
• Backed by a U S based product experts with extensive automotive experience.
• Verify fitment by entering your vehicle make, model and trim in the garage tool to confirm compatibility.

Material and durability

The seal is crafted from quality materials chosen to provide consistent sealing and resistance to common fuel exposure. The design emphasizes a reliable seal that remains effective across a range of driving conditions and fuel types, helping to preserve the integrity of the filler neck area.

Installation and use

As a direct replacement, this seal is intended to fit without modification for the supported vehicles. Prior to installation, clean the filler neck area and inspect the surrounding components. Following standard safety practices when working with the fuel system will help ensure a smooth replacement.

• Simple, tool-friendly replacement.
• Durable materials support lasting sealing performance.
• Garage tool verification reduces the risk of choosing the wrong part.

Compatibility snapshot

This seal covers a defined set of model years for Ford, Lincoln, and Mercury vehicles. Use the model-year ranges below as a guide, and always verify fitment with your exact trim in the garage tool.

• Ford Crown Victoria: 1998–2006
• Ford Mustang: 1999–2004
• Lincoln Town Car: 1998–2004
• Mercury Grand Marquis: 1998–2006
• Mercury Marauder: 2003–2004

Note on fitment

For best results, confirm your trim level using the garage tool before purchasing to ensure a precise match.