Dorman Fuel Filler Neck Seal 577-500 — Direct-Fit Replacement, Durable Elastomer

The Dorman 577-500 Fuel Filler Neck Seal is a direct-fit replacement that restores a proper seal between the fuel filler neck and body to prevent leaks and vapor escape.

If your vehicle’s fuel filler neck seal has become cracked, hardened, or no longer seats correctly, the Dorman 577-500 offers a factory-matching replacement engineered for long service life. Designed to match the original part’s dimensions and function for specific applications, this seal helps maintain proper fuel system containment and component fit with materials selected for durability.

How does this seal restore fuel filler function?

The 577-500 re-establishes the original interface between the filler neck and the vehicle body, preventing fuel seepage and reducing vapor escape. Replacing a worn or damaged seal improves how the filler neck sits and aligns, which can eliminate fuel odors and reduce corrosion risk around the tank opening.

• Direct replacement geometry for compatible years and models
• Provides a tight mechanical seal to limit leaks and fumes
• Helps restore original fit and alignment of the filler neck

What materials and construction qualities does it offer?

The seal is manufactured from durable elastomeric materials chosen to resist weathering, fuel exposure, and repeated use. Its build quality is aimed at long-term service so it doesn’t harden or crack prematurely under typical operating conditions.

• Resilient elastomer construction for flexibility and longevity
• Precision molding to maintain consistent dimensions
• Designed to resist fuel-related degradation and UV exposure

How do I confirm this part fits my vehicle?

Because vehicle fuel systems vary, Dorman recommends verifying fit using your make, model, year, and trim. Use the store’s vehicle fitment tool or compare part numbers and dimensions to your original seal before purchase to ensure compatibility.

• Input vehicle details into the fitment/garage tool
• Compare measurements to the original seal if available
• Consult product notes for specific model applications

Is installation complicated for a home mechanic?

Installation is typically straightforward for someone comfortable with basic automotive tasks. The job generally involves removing the filler neck or accessing the opening, seating the new seal correctly, and reassembling components to factory alignment.

• Basic hand tools and a safe lifting method may be needed
• Clean mating surfaces before installing the new seal
• Follow torque and alignment recommendations when reassembling

Who is this for: The Dorman 577-500 Fuel Filler Neck Seal is aimed at vehicle owners and independent technicians who need a dependable, OEM-style replacement for a failing fuel filler seal. It’s a practical option for anyone restoring proper fuel system fit and reducing leaks or odors without replacing the entire filler assembly. Ideal for repair shops, DIY mechanics, and fleet maintenance where matching original dimensions and reliable materials are priorities.