Dorman 577-502 Fuel Filler Neck Seal

Brand Dorman 577-502
Inside Diameter 1.9
Material Rubber
Outside Diameter 3.1
Package Contents Fuel Tank Filler Neck Grommet
Thickness 0.9
Fits Lincoln, Ford, Mercury, and Merkur · 102 vehicles

OE-style replacement. Matches the original seal's fit and function for dependable sealing.

Rubber construction. Built for durability and reliable performance.

Fuel filler neck seal. Helps maintain a secure seal in the fuel delivery system.

Cross-references Spectra Premium FNA03 and F4ZZ9072A for the same application. See all 2.

$37.66Free shipping
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Fuel Filler Neck Seal for OE-Style Fit

Dorman 577-502 is a rubber fuel filler neck seal made to match the fit and function of the original seal on specified vehicles. It is built for dependable sealing performance at the fuel tank filler neck, helping restore a proper connection between the filler neck and tank opening.

Compatible with a wide range of Ford, Lincoln, and Mercury models, including Mustang, Crown Victoria, Town Car, Grand Marquis, Thunderbird, Cougar, and Continental applications. This Dorman 577-502 fuel filler neck seal is a direct-fit replacement for vehicles that need a precise OE-style grommet at the tank inlet.

Key Features

  • Rubber construction for sealing at the fuel tank filler neck
  • Inside diameter: 1.9 in.
  • Outside diameter: 3.1 in.
  • Thickness: 0.9 in.
  • Package contents: fuel tank filler neck grommet
  • Designed to match original fit and function on listed vehicles

Detailed Description

This fuel filler neck seal is engineered as a replacement for the original seal used on select Ford, Lincoln, and Mercury vehicles from 1981 through 1998. It supports a secure seal where the filler neck enters the fuel tank, helping maintain the intended connection point on applications such as 1982-1988 Ford Thunderbird, 1982-1988 Mercury Cougar, 1982-1997 Ford Mustang, and 1990-1997 Lincoln Town Car. The Dorman 577-502 also cross-references Ford F4ZZ9072A and Spectra Premium FNA03 for the same application.

What It Helps Address

  • Fuel odor around the filler neck area
  • Visible cracking or deterioration in the original rubber seal
  • Loose or poor sealing at the tank filler opening
  • Replacement needs after tank or filler neck service
  • Age-related hardening of the original grommet material

Installation Notes and Tips

Verify the filler neck seal dimensions against the original part before installation. Clean the filler neck and tank opening thoroughly so the new rubber seal seats evenly. Confirm vehicle-specific fitment for your exact year, make, and model, including 1993-1998 Lincoln Mark VIII, 1992-1997 Ford Crown Victoria, and 1983-1997 Mercury Grand Marquis applications.

Quality Assurance

Dorman designs this seal to match original equipment fit and function and to provide durable, reliable performance in fuel system service.

This part fits 102 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1998LincolnMark VIIIN/A
1997FordCrown VictoriaN/A
1997FordMustangN/A
1997LincolnMark VIIIN/A
1997LincolnTown CarN/A
1997MercuryGrand MarquisN/A
1996FordCrown VictoriaN/A
1996FordMustangN/A
1996LincolnMark VIIIN/A
1996LincolnTown CarN/A
1996MercuryGrand MarquisN/A
1995FordCrown VictoriaN/A
1995FordMustangN/A
1995LincolnMark VIIIN/A
1995LincolnTown CarN/A
1995MercuryGrand MarquisN/A
1994FordCrown VictoriaN/A
1994FordMustangN/A
1994LincolnMark VIIIN/A
1994LincolnTown CarN/A
1994MercuryGrand MarquisN/A
1993FordCrown VictoriaN/A
1993FordMustangN/A
1993LincolnMark VIIIN/A
1993LincolnTown CarN/A
1993MercuryGrand MarquisN/A
1992FordCrown VictoriaN/A
1992FordMustangN/A
1992LincolnMark VIIN/A
1992LincolnTown CarN/A
1992MercuryGrand MarquisN/A
1991FordLTD Crown Victoria5.0LV8N/A
1991FordMustangN/A
1991LincolnMark VIIN/A
1991LincolnTown CarN/A
1991MercuryColony ParkN/A
1991MercuryGrand MarquisN/A
1990FordLTD Crown Victoria5.0LV8N/A
1990FordMustangN/A
1990LincolnMark VIIN/A
1990LincolnTown CarN/A
1990MercuryColony ParkN/A
1990MercuryGrand MarquisN/A
1989FordLTD Crown Victoria5.0LV8N/A
1989FordMustangN/A
1989LincolnMark VIIN/A
1989MercuryColony ParkN/A
1989MercuryGrand Marquis5.0LV8N/A
1988FordLTD Crown Victoria5.0LV8N/A
1988FordMustangN/A
1988FordThunderbirdN/A
1988LincolnMark VIIN/A
1988MercuryColony ParkN/A
1988MercuryCougarN/A
1988MercuryGrand Marquis5.0LV8N/A
1987FordLTD Crown Victoria5.0LV8N/A
1987FordMustangN/A
1987FordThunderbirdN/A
1987LincolnMark VIIN/A
1987MercuryColony ParkN/A
1987MercuryCougarN/A
1987MercuryGrand Marquis5.0LV8N/A
1986FordLTD5.0LV8N/A
1986FordMustangN/A
1986FordThunderbirdN/A
1986LincolnContinentalN/A
1986LincolnMark VIIN/A
1986MercuryCapriN/A
1986MercuryCougarN/A
1986MercuryGrand Marquis5.0LV8N/A
1985FordLTD5.0LV8N/A
1985FordMustangN/A
1985FordThunderbirdN/A
1985LincolnContinentalN/A
1985LincolnMark VIIN/A
1985MercuryCapriN/A
1985MercuryCougarN/A
1985MercuryGrand Marquis5.0LV8N/A
1984FordLTD5.0LV8N/A
1984FordMustangN/A
1984FordThunderbirdN/A
1984LincolnContinentalN/A
1984LincolnMark VIIN/A
1984MercuryCapriN/A
1984MercuryCougarN/A
1984MercuryGrand Marquis5.0LV8N/A
1983FordFairmontN/A
1983FordLTD5.0LV8N/A
1983FordMustangN/A
1983FordThunderbirdN/A
1983LincolnContinentalN/A
1983MercuryCapriN/A
1983MercuryCougarN/A
1983MercuryGrand Marquis5.0LV8N/A
1983MercuryZephyrN/A
1982FordMustangN/A
1982FordThunderbirdN/A
1982LincolnContinentalN/A
1982MercuryCapriN/A
1982MercuryCougarN/A
1981FordMustangN/AFrom 4/81
1981MercuryCapriN/AFrom 4/81
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Spectra Premium — FNA03F4ZZ9072A