Seal your fuel system and keep vapors where they belong with the Gates Fuel Tank Cap 31856. It installs as a direct-fit replacement for the listed applications, including the 2010-2013 Ford Transit Connect, 2005-2008 Jaguar S-Type, 2001-2007 Jaguar X-Type, 2005-2009 Land Rover LR3, 2004-2009 Mazda 3 (plus the 2009 Mazda 3 Sport), 2006-2010 Mazda 5, 2008-2013 Volvo C30, 2006-2013 Volvo C70, 2004-2011 Volvo S40, and 2005-2011 Volvo V50 — see the "Vehicles it fits" section for the full list.
- Sealed filler closure: Fits onto the fuel filler neck to close the tank and maintain the sealed environment the fuel system needs.
- Vapor containment: Helps keep fuel vapor inside the tank and routed through the intended evaporative path rather than escaping to the atmosphere.
- Contaminant barrier: Helps keep dirt, debris, and moisture out of the filler neck.
Signs the cap may need replacing include a fuel odor, a cap that won't click or tighten, a cracked or worn seal, or an evaporative-system-related check engine light. If a loose, cracked, or worn cap is the cause of an EVAP leak code, this replacement addresses it — diagnose the cause first, since other components can set the same code.
Interchange: 35080 · 10521 · MGC-905 · MGC905 · 703-4119 · 7034119 · 46380. Manufacturer part number 31856.
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
35080, 10521, MGC-905, 703-4119, 31856, 46380
Frequently Asked Questions
What vehicles does the Gates 31856 fuel tank cap fit?
It's a direct-fit replacement for applications like the 2010-2013 Ford Transit Connect, 2001-2007 Jaguar X-Type, 2004-2009 Mazda 3, and 2004-2011 Volvo S40 — see the "Vehicles it fits" section for the full list.
What does a fuel tank cap do?
It fits onto the filler neck to seal the tank, maintain the sealed fuel-system environment, keep fuel vapor routed through the intended path, and help block dirt and moisture from entering.
Can a bad fuel cap trigger a check engine light?
Yes — a loose, cracked, or worn cap can cause an evaporative-system leak that sets a code. If the cap is the cause, replacing it addresses it; diagnose first, since other parts can set the same code.
What numbers does this cap interchange with?
It cross-references 35080, 10521, MGC-905 (MGC905), 703-4119 (7034119), and 46380.
How do I know my cap needs replacing?
Signs may include a fuel odor, a cap that won't click or tighten, a cracked or worn seal, or an evaporative-system-related check engine light.
