How to Lock Your RV Fuel Door (When You Don't Have One)

## How to Lock Your RV Fuel Door (When You Don't Have One) **You can't lock an RV fuel door that doesn't exist — and most motorhomes don't have one.** If you're searching for an "RV fuel door lock," you've probably already discovered the problem: your motorhome's fuel cap is just sitting out in the open with no door to lock in the first place. The solution isn't a lock for your fuel door. It's a fuel door WITH a lock — and that's exactly what The RV Fuel Vault is. ### Why Doesn't My RV Have a Locking Fuel Door? Motorhomes are built on commercial truck chassis (Ford F-550, E-450, F53, Ram 5500, Workhorse). These chassis were designed for fleet vehicles that fuel at secure depots — not for $200K+ RVs that park overnight at campgrounds and Walmart lots. Nobody at the factory added a fuel door because it was never part of the commercial truck design. ### What About Aftermarket Locking Gas Caps? Locking gas caps are better than nothing, but they have serious limitations: - **Easy to defeat** — a pipe wrench or large pliers can snap most locking caps in seconds - **Poor fit** — caps designed for passenger cars don't properly fit commercial chassis filler necks - **No enclosure** — they only protect the cap, not the filler neck area around it - **Contamination risk** — someone can still pour liquid around the cap seal ### The Real Solution: A Bolt-On Locking Fuel Door **[The RV Fuel Vault](/#pre-order)** gives your motorhome the locking fuel door it should have come with: - **Tamper-resistant keyed lock** — recessed cylinder that resists prying, drilling, and picking - **Full filler neck enclosure** — covers the cap AND the entire fuel port area - **3/16" fiber-filled polymer** — high-strength construction that defeats common break-in tools - **One key for both sides** — diesel rigs with dual caps get matching keyed locks - **8–15 minute bolt-on install** — no drilling, no cutting, no permanent modifications Fits all major motorhome chassis: Ford E-350, E-450, F-550, F-600, F53, Workhorse W22/W24, and Ram 5500. Starting at $99.95. Free shipping. Limited Lifetime Warranty. Made in the USA. *Patent Pending*