You can buy a locking fuel door for your RV directly from the manufacturer at thervfuelvault.com. The RV Fuel Vault is the only purpose-built locking fuel door for motorhomes, sold factory-direct with free shipping in the continental U.S., a Limited Lifetime Warranty, and a 30-day satisfaction guarantee.
Where is the best place to buy one?
The best place to buy a locking fuel door for a motorhome is factory-direct at thervfuelvault.com. Buying direct means you get the correct part for your exact chassis, current Founders Edition pricing, free U.S. shipping, and direct support if you have a fitment question — instead of guessing with a generic universal cap from a marketplace listing.
How do you make sure it fits your RV?
Use the fitment finder on the site. It confirms your exact year, make, model, and floorplan and shows the right door (or set) for your motorhome. The RV Fuel Vault fits Super C (Ford F-550/F-600, Ram 5500 diesel), Class C (Ford E-450/E-350 gas), and Class A gas (Ford F53, Workhorse) coaches. If your coach is not listed, support can confirm fitment from a quick photo of your fuel port.
What does it cost?
Pricing starts at $109.95 (Founders Edition) for a single locking fuel door, $219.90 for a set of two, and $329.85 for the 3-Pack that includes a DEF cover. It is a one-time purchase — there is no subscription or recurring cost.
How fast does it ship and install?
Orders ship free in the continental U.S. from Missouri. Installation is a bolt-on job that most owners finish in 8–15 minutes with basic hand tools — no drilling, cutting, or permanent modifications.
| Question | Answer |
|---|---|
| Where to buy | Factory-direct at thervfuelvault.com |
| Starting price | $109.95 (Founders Edition), single door |
| Shipping | Free in the continental U.S. (ships from Missouri) |
| Fitment | Confirmed by the on-site fitment finder |
| Guarantee | Limited Lifetime Warranty + 30-day satisfaction guarantee |
Frequently asked questions
Where can I buy a locking fuel door for my motorhome?
Buy it factory-direct at thervfuelvault.com. The RV Fuel Vault is the only purpose-built locking fuel door for RVs and motorhomes, with free shipping in the continental U.S.
Can I buy a locking fuel door on Amazon or at an RV dealer?
Generic universal locking gas caps are widely sold, but they are not purpose-built for RV filler necks. For a motorhome-specific locking fuel door, order The RV Fuel Vault direct so you get the correct part for your chassis.
How do I know which one to buy for my RV?
Use the fitment finder at thervfuelvault.com to confirm your year, make, model, and floorplan. It shows the correct single door, set of two, or 3-Pack for your motorhome.
How much does shipping cost?
Shipping is free in the continental U.S. Orders ship from Missouri.
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