You\u2019re Upgrading Your AC with CoolAir \u2014 But Your Fuel Cap Has Zero Protection
CoolAir ductwork is one of the best comfort upgrades for your motorhome \u2014 better airflow, more even cooling, quieter operation. But while you\u2019re making the inside of your rig more comfortable, there\u2019s a glaring security gap on the outside: your fuel cap is completely exposed. No door, no lock, no protection. The RV Fuel Vault fixes that in 15 minutes.
The Problem
- ✖You invested in CoolAir to improve your RV’s comfort — smart upgrade. But your fuel system has zero protection.
- ✖Every motorhome leaves the factory with a completely exposed, unlocked fuel cap — no door, no cover
- ✖Diesel costs $4-5/gallon — your 50-100 gallon tank is worth $200-500 and completely unprotected
- ✖Thieves can siphon your tank in minutes while you’re sleeping — at campgrounds, truck stops, even your driveway
- ✖Road grime, water, and contaminants collect around the exposed filler neck every time you drive
- ✖You’re upgrading the inside — it’s time to upgrade the outside too
The RV Fuel Vault Solution
- The RV Fuel Vault is a locking fuel door that bolts on in 15 minutes — the perfect companion to your CoolAir upgrade
- Tamper-resistant keyed lock stops fuel theft, siphoning, contamination, and vandalism
- Factory-finished look that transforms the driver side from ugly exposed cap to clean, intentional design
- High-strength 3/16″ fiber-filled polymer — UV-resistant, corrosion-proof, all-weather durable
- Exact-fit for your specific chassis — Ford E-350, E-450, F-550, F-600, F53, Workhorse, Ram 5500
- Starting at $84.95 — less than a tank of diesel and protects every fill-up after that
See the Difference
Why You Need a Locking Fuel Door
Lead with finish. End with security.
Complete Your Upgrades
CoolAir handles comfort. The RV Fuel Vault handles security. Now your rig is upgraded inside and out.
Lock Down Your Fuel
A tamper-resistant keyed lock means nobody is siphoning your diesel while you’re enjoying your cool, comfortable rig.
Protect Your Engine
Just like CoolAir protects your AC efficiency, The RV Fuel Vault keeps water, road grime, and debris out of your fuel system.
Same Easy Install
If you can follow CoolAir’s install instructions, you can install The RV Fuel Vault. Bolt-on, basic tools, done in 15 minutes.
Installs in 8–15 Minutes — No Drilling, No Cutting
8–15 Minutes
Average install time
Basic Hand Tools
No special equipment needed
100% Reversible
No drilling, no cutting, no mods
Compatible Chassis & Models
| Manufacturer | Models / Floorplans |
|---|---|
| Ford E-350 / E-450 | Class C — Coachmen, Thor, Winnebago, Jayco, East to West, Entegra, Forest River, Gulf Stream |
| Ford F-550 / F-600 | Super C — Thor, Dynamax, Entegra Accolade/Accolade XL, Jayco, Renegade |
| Ford F53 | Class A — Coachmen, Thor, Winnebago, Tiffin, Fleetwood, Newmar, Holiday Rambler |
| Workhorse W22/W24 | Class A — Coachmen Mirada, Thor Windsport/Hurricane |
| Ram 5500 | Super C — Dynamax Isata 5, Grand Design Lineage |
Frequently Asked Questions
Common questions about The RV Fuel Vault
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Single Door, Set of 2, or 3-Pack · Free Shipping · Limited Lifetime Warranty · 30-Day Guarantee
Order My RV Fuel VaultProudly Made in the USA · Patent Pending 19/632,042 · Est. delivery by July 4, 2026