Gates 31841 Fuel Tank Cap

OE Equivalent Fuel Cap for Ford and Mazda

Gates 31841 is an OE Equivalent Fuel Tank Cap built with heavy-duty construction for a secure, factory-style seal. It is made for vacuum-only applications and is a direct replacement choice for many Ford, Lincoln, Mercury, Mazda, and Chevrolet vehicles.

Key Features

• OE Equivalent Fuel Cap with OE Performance comparison rating
• Vacuum-only venting for the correct fuel system application
• Quick-On cam type for fast, secure installation
• Fits shallow and deep cam filler necks
• Rugged, heavy-duty construction
• Non-lockable design
• Thread diameter: 1.56 in; shell diameter: 2.75 in; depth: 1.9 in

Product Details

This Gates fuel tank cap is engineered to meet or exceed OEM specifications and restore proper sealing at the filler neck. The Gates 31841 is a practical replacement for worn, cracked, or missing caps on applications such as the Ford F-150, Ford Ranger, and Mazda CX-9. It also cross-references CSF 10840 for the same application.

Common Issues It Can Help Address

• Check engine light caused by a loose or failing fuel cap seal
• Fuel vapor loss from a worn cap gasket or sealing surface
• Difficulty maintaining proper tank vacuum in vacuum-only systems
• Fuel odor around the filler area from an improper seal
• Cap fitment problems on quick-on cam filler necks

Installation Notes and Fitment Tips

Verify filler neck style before ordering, especially on 2004 Ford and Mercury applications with white-bottom OE caps and orange O-ring seals. This part fits 2023-2024 Chevrolet Express 2500 and Express 3500, 2019-2023 Ford Ranger, 2005-2022 Ford F-250 Super Duty, 2005-2022 Ford F-350 Super Duty, 2005-2014 Ford E-Series and Econoline models, and many 2004-2014 Ford, Lincoln, Mercury, and Mazda vehicles. Additional fitment includes 2005-2008 Ford F-150, 2007-2010 Ford Edge, 2009-2013 Mazda 6, and 2010-2014 Mazda CX-9. Confirm the cap style and filler neck configuration against the vehicle listing before installation.

Quality Assurance

Gates OE Equivalent Fuel Caps are built to meet or exceed OEM specifications and are intended to deliver OE-style fit and sealing performance for the listed applications.