Locking Fuel Door for Ford
The only bolt-on locking fuel-door enclosure purpose-built for Ford F-550, F-600, E-350, E-450 & F53 chassis. Fits Super C, Class C & Class A motorhomes plus work trucks, fleet vehicles & commercial upfits.
Patent Pending · Made in Sarasota, FL · From $99.95
The Part the Factory Forgot
Every Ford chassis — from the E-350 to the F-600 — ships with a completely exposed fuel cap. No door, no cover, no protection.
Exposed cap — zero security
RV Fuel Vault installed — locked & finished
Why Your Ford Needs a Locking Fuel Door
Whether you drive a Super C motorhome or a work truck, the problem is the same.
Every Ford-chassis RV and work truck leaves the factory with a completely exposed fuel cap — no fuel door at all
Diesel rigs carry 50–80+ gallons worth $250–$400+ in fuel — a target at every rest stop, job site, and campground
Sugar, water, or DEF contamination in your fuel tank means $5,000–$15,000 in engine and emissions repairs
Exposed caps on work trucks and fleet vehicles invite opportunistic theft and vandalism overnight
Generic aftermarket caps and locks don’t fit Ford chassis filler neck geometry — they wobble, leak, or crack
Compatible Ford Chassis
One product family, five Ford platforms. Every door is engineered for the exact filler neck geometry of its target chassis.
| Ford Chassis | Class | Fuel | Application | Popular Models |
|---|---|---|---|---|
| Ford F-550 | Super C | Diesel + DEF | RV & Work Truck | Dynamax Isata 5/6, Entegra Accolade XT, Jayco Seneca XT, Thor Magnitude, East to West Bravado, service trucks, utility bodies |
| Ford F-600 | Super C | Diesel + DEF | RV & Work Truck | Fleetwood Altitude 600D, Holiday Rambler Incline FS600D, commercial service trucks, crane trucks |
| Ford E-350 | Class C | Gas | RV & Work Truck | Coachmen Freelander/Leprechaun, Thor Four Winds/Chateau, Winnebago Minnie Winnie/Spirit, shuttle buses, delivery vans |
| Ford E-450 | Class C | Gas | RV & Work Truck | Jayco Greyhawk/Redhawk, Entegra Odyssey/Esteem, Forest River Sunseeker, Thor Quantum, ambulances, box trucks |
| Ford F53 | Class A | Gas | RV | Thor Windsport/Hurricane, Fleetwood Bounder/Flair, Jayco Precept/Alante, Winnebago Adventurer/Vista, Tiffin Open Road, Newmar Bay Star |
Ford F-550
Super CFuel
Diesel + DEF
Application
RV & Work Truck
Popular Models
Dynamax Isata 5/6, Entegra Accolade XT, Jayco Seneca XT, Thor Magnitude, East to West Bravado, service trucks, utility bodies
Ford F-600
Super CFuel
Diesel + DEF
Application
RV & Work Truck
Popular Models
Fleetwood Altitude 600D, Holiday Rambler Incline FS600D, commercial service trucks, crane trucks
Ford E-350
Class CFuel
Gas
Application
RV & Work Truck
Popular Models
Coachmen Freelander/Leprechaun, Thor Four Winds/Chateau, Winnebago Minnie Winnie/Spirit, shuttle buses, delivery vans
Ford E-450
Class CFuel
Gas
Application
RV & Work Truck
Popular Models
Jayco Greyhawk/Redhawk, Entegra Odyssey/Esteem, Forest River Sunseeker, Thor Quantum, ambulances, box trucks
Ford F53
Class AFuel
Gas
Application
RV
Popular Models
Thor Windsport/Hurricane, Fleetwood Bounder/Flair, Jayco Precept/Alante, Winnebago Adventurer/Vista, Tiffin Open Road, Newmar Bay Star
Don't see your vehicle? Submit a Fitment Request — we'll research it for free.
Why The RV Fuel Vault for Your Ford
Precision-engineered for Ford filler neck geometry — F-550, F-600, E-350, E-450 & F53
Covers diesel fuel AND DEF caps on Super C chassis
Tamper-resistant keyed lock — one key secures your fuel system
Bolt-on install in 8–15 minutes — no drilling, no cutting, no modifications
High-strength fiber-filled polymer — UV-stable, weather-proof, road-ready
Factory-finished appearance — eliminates that exposed-cap look instantly
Works on motorhomes, work trucks, shuttle buses, ambulances & fleet vehicles
Made in the USA — designed, engineered & assembled in Sarasota, FL
Built for the Road & the Job Site
Whether your Ford is a weekend warrior or a daily workhorse, The RV Fuel Vault has you covered.
RV Fuel Theft Prevention
Campgrounds, Walmart lots, rest areas — your fuel is locked down 24/7. No more worrying when you're sleeping inside your rig.
Work Truck Fleet Security
Service trucks, utility bodies, and delivery vehicles parked overnight at job sites. One door, one key — across your entire Ford fleet.
Contamination Defense
Prevents sugar, water, or foreign fluids from being added to your diesel or gas tank. Protects both fuel and DEF on diesel chassis.
Factory-Finished Appearance
Your $150K–$500K motorhome or $80K work truck finally looks production-complete. No more exposed plastic caps.
Bolt-On. No Drilling. No Cutting.
The RV Fuel Vault installs with basic hand tools in 8–15 minutes on any supported Ford chassis. No permanent modifications — remove it anytime and your vehicle is back to stock.
8–15 min
Install time
0 holes
No drilling
Lifetime
Warranty
Frequently Asked Questions
Lock Down Your Ford's Fuel — Today
From $99.95. Bolt-on in minutes. Lifetime warranty. The part every Ford RV and work truck should have had from the factory.
Free shipping · Limited Lifetime Warranty · 100% satisfaction guaranteed