What makes an anti-theft fuel cap cover different from a locking gas cap?

A locking gas cap only protects the cap opening itself and can be defeated in seconds with a pipe wrench. The RV Fuel Vault is a full anti-theft fuel cap cover — a locking door that seals over the entire filler neck, cap, and surrounding area with a tamper-resistant keyed lock and 3/16″ fiber-filled polymer construction.

Which motorhome chassis does this anti-theft fuel cap cover fit?

The RV Fuel Vault fits Ford E-350, E-450, F-550, F-600, F53, Workhorse W22/W24, and Ram 5500 chassis. This covers virtually every major Super C, Class C, and Class A motorhome brand including Entegra, Jayco, Thor, Coachmen, Fleetwood, Winnebago, Newmar, Tiffin, Dynamax, and Grand Design.

How do I install an anti-theft fuel cap cover on my RV?

Installation takes 8–15 minutes with basic hand tools. The RV Fuel Vault bolts on over your existing filler neck — no drilling, cutting, or modifications to your motorhome.

Is the anti-theft fuel cap cover weatherproof?

Yes. The cover is made from UV-stabilized, corrosion-resistant automotive polymer that withstands extreme heat, cold, salt spray, diesel exposure, and road debris. It carries a Limited Lifetime Warranty.

How much does an anti-theft fuel cap cover for an RV cost?

Single Door starts at $99.95, a Set of 2 is $199.95, and a 3-Pack with DEF cover is $299.95. Free U.S. shipping on all orders.

Stop RV Fuel Theft at the Cap

A patent-pending anti-theft fuel cap cover with a tamper-resistant keyed lock, purpose-engineered for motorhome chassis. Blocks siphoning, contamination & vandalism cold.

The RV Fuel Vault — RV fuel cap cover, fuel hatch cover and gas cap hatch for Super C and Class C motorhomes

The Problem

✖Diesel theft is up sharply at campgrounds, truck stops & Walmart overnight parking — a single full siphon drain costs hundreds in fuel
✖Your Super C, Class C or Class A motorhome has exposed diesel, DEF, and gas caps that any passerby can see and reach
✖Stock OEM caps have no anti-theft features — and locking gas caps don’t fit Ford E-350, E-450, F-550/F-600, or F53 filler necks
✖Sugar, water, or debris dropped down an open cap can destroy a diesel engine and cost $15,000+ to repair
✖Standard locking fuel caps can be drilled or snapped off in under a minute with basic tools

The Solution

Patent-pending locking fuel door (U.S. Patent Application 64/085,223) with a tamper-resistant keyed lock — not a cheap cylinder latch
Completely blocks siphon hoses, contamination, and vandalism — your fuel system is sealed behind a 3/16″ fiber-filled polymer door
Virtually unbreakable: high-impact composite defeats pry bars, screwdrivers & impact tools that destroy standard locking caps
Non-corrosive, UV-stabilized automotive finish — won’t rust, fade, crack, or fail in salt, diesel or extreme heat/cold
Fits Ford E-350, E-450, F-550/F-600, F53 & Workhorse motorhome chassis — Entegra, Jayco, Thor, Coachmen, Fleetwood, Winnebago, Newmar, Tiffin, Dynamax, Grand Design & more
Bolt-on install in 8–15 minutes • zero modifications • same key opens both sides
Single Door ($99.95) • Set of 2 ($199.95) • 3-Pack with DEF cover ($299.95) • free U.S. shipping • Limited Lifetime Warranty

Frequently Asked Questions

Why Every Motorhome Needs an Anti-Theft Fuel Cap Cover

Diesel fuel theft from RVs and motorhomes has increased dramatically in recent years. Campgrounds, Walmart overnight parking lots, truck stops, and even driveways are common targets. The standard fuel cap on most Super C, Class C, and Class A motorhomes offers zero security.

The RV Fuel Vault is the first purpose-built anti-theft fuel cap cover designed specifically for motorhome chassis. Unlike universal locking gas caps, The RV Fuel Vault is engineered for exact-fit on Ford E-350, E-450, F-550/F-600, F53, Workhorse, and Ram 5500 chassis.

Patent Pending (Application 64/085,223) · Made in USA · Limited Lifetime Warranty

Order Today — Starting at $99.95

Single Door, Set of 2, or 3-Pack · Free shipping · Limited Lifetime Warranty · 30-day guarantee

Order Now

Proudly Made in the USA · Patent Pending 64/085,223