Gates 31830Y Fuel Tank Cap

Gates Flex Fuel Regular Fuel Cap 31830Y

The Gates Flex Fuel Regular Fuel Cap is a yellow replacement fuel tank cap marked for E85 use, helping drivers identify vehicles that can run gasoline or E-85 ethanol. Built as a pressure-vacuum, 1/8-turn cap, it is made for specific Ford, Mercury, and Mazda applications where the original cap style and fitment match.

Key Features

• Gates Flex Fuel Regular Fuel Cap, part number 31830Y
• Yellow plastic cover with E85 designation for flex-fuel identification
• Pressure-vacuum venting for the specified fuel system design
• 1/8-turn cam type for proper cap engagement
• Non-lockable design
• Thread diameter: 1.67 in.; shell diameter: 2.91 in.; depth: 2.38 in.

Product Details

Gates 31830Y is a flex fuel regular fuel cap for vehicles equipped for gasoline or E-85 ethanol use. The yellow cap color and E85 marking provide a clear visual reminder at the fuel door, while the pressure-vacuum venting and 1/8-turn cam design support the original fuel tank cap configuration on listed applications. This part cross-references 10832Y and 11832Y for the same application.

Compatible fitment includes 1996-2003 Ford Taurus, 1999-2003 Ford Ranger, 2002-2003 Ford Explorer, 2002-2003 Ford Explorer Sport, 2002-2003 Mercury Mountaineer, 2000-2002 Mazda B3000, and select Ford F-Series and Econoline applications. It also fits 2004-2005 Ford Taurus, 2004 Ford Explorer, and 2004 Mercury Mountaineer with the noted OE cap style requirements. The Gates 31830Y is a direct-fit fuel tank cap choice for drivers servicing a Ford Taurus fuel cap, Ford Ranger fuel cap, or Mercury Mountaineer fuel cap application.

What It Helps Address

• Missing or damaged flex-fuel fuel tank cap
• Incorrect cap identification on E85-capable vehicles
• Fuel system sealing issues related to a worn cap
• Fitment problems caused by using the wrong cap style
• Replacement needs for listed Ford, Mercury, and Mazda fuel tank cap applications

Installation Notes and Tips

Verify the original cap style, thread diameter, and venting before installation. This part is listed for specific vehicles with notes such as black-bottom OE cap requirements or no threaded filler neck on certain Ford F-150 and F-350 applications. Confirm the vehicle year, make, model, and fuel door configuration against the fitment list before ordering. The cap uses a 1/8-turn cam design and is not lockable.

Quality Assurance

Gates manufactures this flex fuel regular fuel cap to match the listed application details, including color, venting type, and cap style. Part number 31830Y is cataloged for the specified fitment coverage across Ford, Mercury, and Mazda vehicles.