Made in the USA — shipped fast from Sarasota, FL 🇺🇸
The RV Fuel Vault™
Locking Fuel Door for Super C, Class C & Class A Motorhomes
The Part the Factory Forgot • Armored • Heavy-Duty • Tamper-Resistant
- Locking fuel-door enclosure for diesel and gas motorhomes — not a cap, a complete enclosure
- Fits Ford E-350/E-450, F-550/F-600, F53/Workhorse & RAM 5500 chassis
- Installs in 8–15 minutes with basic hand tools — no drilling or cutting
In stock now — starting at $159.95 (Save up to $60).
Secure checkout powered by Stripe.
In stock · Ships within 3 business days · UPS shipping calculated at checkout.
As Featured In
The #1 RV Fuel Door & Fuel Tank Hatch
Say goodbye to ugly green diesel fuel caps, blue DEF caps, and exposed black gas caps. The RV Fuel Vault™ is a purpose-built locking fuel-door enclosure that gives your motorhome a clean, factory-finished look while protecting the entire fuel-port area against theft, siphoning, contamination, and vandalism. Not a cap replacement — a complete enclosure. Purpose-built for Super C, Class C & Class A motorhomes on Ford E-350, E-450, F-550, F-600 & F53 Workhorse and Dodge RAM 5500 chassis.
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The RV Fuel Vault™
Fuel Cap Cover for RV — Diesel & Gas
Fits perfectly over OEM fuel area
Single Small Door
Super C F550, F600 & RAM 5500
Save $30
Order this package
Single Large Door
E350, E450, F-53 — Class C & A
Save $30
Order this package
Small Door Pack of 2 for most Super C Diesels
Both fuel caps covered for Super F550 or F600
Save $60
Order this package
Small Door Pack of 3 for Most Grand Design Super C Lineage Models
Both fuel caps + DEF tank
Save $90
Order this package
✓ Fast UPS Shipping — Calculated at Checkout
All other locations plus shipping
Proudly Made in the USA!
Order Now — Starting at $159.95🔒 Order Now — Starting at $159.95In stock — ships within 3 business days. UPS shipping calculated at checkout.
Virtually Unbreakable
Manufactured from high-strength, fiber-filled polymer — 3/16″ thick and non-corrosive. Stands up to salt, oil, diesel, and extreme heat or cold.
Universal Fit
Designed for Ford F-550/F-600, E-450, F53 & Workhorse chassis fuel cap configurations found on all major Super C, Class C, and Class A motorhome brands.
Easy Installation
Simple bolt-on installation requires no modifications to your motorhome. Complete in minutes.
Tamper-Resistant Design
Keyed lock mechanism prevents unauthorized access to your fuel caps.
“Any customer can have a car painted any color that he wants — so long as it is black.”
— Henry Ford
But if you need yours in a custom painted color, we can do that too — as a special order.
Contact us to discuss your color-match options.
See the Difference
Drag the slider to compare — ugly, exposed fuel caps vs. The RV Fuel Vault's slick, factory-finished look with built-in security.
Looks like it came
from the factory
This Grand Design Lineage “43” has The RV Fuel Vault™ doors installed — and you'd never guess they weren't built in. The enclosure follows the coach's lines for a clean, finished, OEM look while locking your fuel fills down tight.
- Bolt-on fit — no cutting, no drilling into the tank
- Factory-matched, paint-ready finish
- Locks out siphoning, theft & fuel contamination
Boom There It Is! — Take It From Jeremy, WeldTec Designs!
Jeremy at WeldTec Designs builds and upfits some of the toughest Super C and Class C rigs on the road. He put The RV Fuel Vault™ through his own hands-on look — fit, finish, hardware, and how it actually stops fuel theft and siphoning. Watch his honest take, then decide for yourself.
Independent review by WeldTec Designs — an authorized RV Fuel Vault dealer and Super C upfitter. Not a paid advertisement.
Read the full reviewWhy You Need The RV Fuel Vault
Ugly green diesel caps, blue DEF caps, and exposed black gas caps don't belong on your motorhome. The RV Fuel Vault™ is the only locking fuel-door enclosure purpose-built for motorhomes — it covers the entire fuel-port area, not just the cap. A factory-finished look plus real security for your fuel system.
Factory-Finished Look
Cover those ugly green diesel fuel caps, blue DEF caps, and exposed black gas caps with a slick, rugged fuel door. Your rig finally looks production complete — like it rolled off the assembly line this way.
Deter Fuel Theft
Stop siphoning and unauthorized fuel access with a tamper-resistant locking fuel door. Unlike decorative chrome fuel doors, The RV Fuel Vault keeps your diesel exactly where it belongs.
Block Contamination
This heavy-duty fuel door cover prevents sugar, water, sand, and debris from entering your fuel system. Guard against costly engine damage with a purpose-built shield over your fuel cap.
Stop Vandalism
Deter intentional damage to your fuel tank or filler neck. The RV Fuel Vault acts as an armored barrier — high-impact composite that's virtually unbreakable.
Clean, Rugged Design
No more eyesore fuel caps ruining your motorhome's exterior. The UV-stabilized, corrosion-proof automotive-grade finish blends seamlessly with your chassis for a clean, professional appearance.
Peace of Mind
Park anywhere with confidence knowing your fuel system is secured and your rig looks sharp. Camp, explore, and enjoy the journey worry-free.
RV Fuel Theft Is a Real, Documented Problem
It isn’t hype. Trusted RV publications and security experts warn that motorhomes are easy targets — and that ordinary locking caps don’t always hold up.
Locking fuel caps “are not impenetrable; there have been reports of thieves forcibly ripping caps off, rendering the lock ineffective.”
— RVtravel.com, on protecting your RV from fuel theft
Read the RVtravel.com reportThat’s the gap we close.
A small threaded cap is a deterrent — not a barrier. The RV Fuel Vault is a heavy-duty, bolt-on locking enclosure molded from virtually unbreakable 3/16″ polymer that resists tampering and seals out contamination.
Order Your RV Fuel Vault™In Stock & Ready to Ship
Armored, locking fuel doors custom-matched to your Super C, Class C or Class A motorhome — in stock now and shipping within 3 business days.
What You Get With Your Order
Straightforward Pricing
Single, 2-door and 3-door packages start at just $159.95, with fair UPS shipping calculated live at checkout.
Fast Shipping — Ships Within 3 Business Days
In stock and ready to go. Your RV Fuel Vault ships within 3 business days, with UPS shipping calculated live at checkout.
No-Risk Guarantee
Every order is backed by our 30-Day Satisfaction Guarantee. If your plans or coach change, just let us know for a full refund — no hassle.
Lifetime Protection & Peace of Mind
Every RV Fuel Vault is backed by a Limited Lifetime Warranty and 30-Day Satisfaction Guarantee — so you can camp, travel and store your rig with confidence.
Takes about 2 minutes. Secure checkout powered by Stripe.
Find Your Fit
Tell us which motorhome you own and we'll automatically select the exact RV Fuel Vault package for your chassis and fuel cap layout. No guesswork — just pick your rig and order.
Not sure which chassis you have? Contact us — we'll help you confirm before you order. If your coach isn't listed yet, order anyway and we'll confirm fitment before we ship.
Step 2
Complete Step 1 to Unlock Door Pricing
Doors come in multiple sizes and quantities depending on your chassis and fuel cap layout. Use Find Your Fit above and we'll automatically match the exact RV Fuel Vault package, size and add-ons for your motorhome — no guesswork, no wrong orders.
Go to Step 1 — Find My Fit™Looking for doors, bezels or security screws on their own? Scroll down to the Parts & Accessories shop below — those don't require fitment.
Answers Before You Order
Everything RV owners ask before ordering The RV Fuel Vault.
Still have a question? Contact us and we’ll get back to you same day.
Why RV Owners Are Ordering Now
In stock and shipping within 3 business days — here's why motorhome owners choose The RV Fuel Vault.
Straightforward, Fair Pricing
Single, 2-door and 3-door packages start at just $159.95, with fair UPS shipping calculated live at checkout — no gimmicks.
In Stock — Ships in 3 Business Days
All four door sizes are in stock and ready to ship. Order today and your rig is protected within days, with UPS shipping calculated live at checkout.
Backed by Real RV Enthusiasts
The RV Fuel Vault was designed and tested by motorhome owners who got tired of exposed fuel caps and real fuel-theft risk. Your order directly supports the team building a purpose-built solution for our community.
Join the first wave of RV owners locking down their fuel system with The RV Fuel Vault.
In stock — ships in 3 business days · Limited Lifetime Warranty · 30-Day Satisfaction Guarantee
Not ready to order? Stay in the loop.
Get progress updates, real installation photos on Super C, Class C and Class A coaches, and a heads-up before retail pricing kicks in.
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Just Need Doors, Housing Bezels or Accessories?
Order an RV Fuel Vault door on its own or grab the accessories matched to your setup — no vehicle lookup required.
Simple Installation
No modifications required. Install the RV Fuel Vault in minutes with basic hand tools.
Unbox & Verify
Verify all components are included: RV Fuel Vault covers, your existing screws or new Security Screws purchased from us as mounting hardware, lock and a set of keys.
Position the Cover
Remove your existing exposed fuel bezel screws, align the RV Fuel Vault cover over the exposed fuel cap area on your motorhome. Ensure proper orientation using the screw holes.
Secure & Fasten
Using the existing screws or new Safety Screws you purchased from us, secure the cover in place. Hand-tighten all bolts, then torque to until tight.
Test & Lock
Test the locking mechanism with both provided keys. Verify the cover is secure and fuel cap is fully accessible when unlocked.
Estimated install time: 8–15 minutes.
Detailed installation instructions with photos will be included with your order.
Our Guarantee
Limited Lifetime Warranty
The RV Fuel Vault™ is built to last. We warrant against defects in material and workmanship for the life of the vehicle on which it was originally installed.
Satisfaction Guaranteed
Not satisfied? Return within 30 days of receipt for a full refund. We're confident you'll love the security and peace of mind.
Free Replacements
If your RV Fuel Vault is defective under normal use conditions within the warranty period, we'll replace it at no charge.
The No-Siphon Promise
If fuel is siphoned or contaminated through a fuel fill secured by a properly installed, registered RV Fuel Vault, we'll reimburse your insurance deductible up to $500 — that's how confident we are it works.
See guarantee detailsFrequently Asked Questions
Our Story
Born from the RV community, The RV Fuel Vault™ was created by fellow motorhome enthusiasts who recognized a critical vulnerability in Super C motorhomes built on Ford chassis.
After experiencing firsthand the anxiety of leaving exposed fuel caps unprotected at campgrounds, rest stops, and overnight parking, we set out to engineer a solution that was as rugged as the rigs it protects.
The RV Fuel Vault brings years of experience in the transportation and RV industry to deliver a product you can trust. Every RV Fuel Vault is designed, tested, and built to the highest standards. Meet Tank, our mascot and guardian of the open road →
RV Community
Built by Enthusiasts
Made in USA
Quality Assured
Family Owned
Personal Service
High-Impact Composite
3/16″ fiber-filled polymer — virtually unbreakable
UV-Stabilized & Corrosion-Proof
Resists salt, oil, diesel & extreme temps
Made in Florida
Designed & manufactured in Sarasota, Florida
100% Warranty Compliant
Bolt-on, no-mod design — warranty safe
The RV Fuel Vault at a Glance
The first heavy-duty, bolt-on locking fuel door purpose-built for RV motorhomes — not a fuel cap, not a cosmetic hatch.
Loved by RV Owners
Rated 5.0 out of 5 across 43 verified RV owner reviews, with 44 real customer installs documented. Read them at thervfuelvault.com/gallery.
What It Is
An armored, bolt-on locking fuel door enclosure that covers the exposed factory fuel cap on RVs and motorhomes. Stops fuel theft, siphoning, contamination, and vandalism.
Built to Last
3/16″ High Impact Reinforced Material — UV-stable, non-corrosive, virtually unbreakable. Tamper-resistant keyed lock. Will not crack like factory plastic or rust like metal.
8–15 Minute Install
Zero drilling, zero cutting, zero modifications. Bolts on with basic hand tools over the factory filler-neck bezel. Retains factory warranty.
Chassis Compatibility
Ford F-550 & F-600 (Super C diesel), Ford E-350 & E-450 (Class C gas), Ford F53 & Workhorse (Class A gas), Ram 5500 (Super C diesel). Fitment records back to the 1990s.
Brand Coverage
Grand Design Lineage, Dynamax Isata, Jayco Seneca, Entegra Accolade, Thor, Coachmen, Fleetwood, Forest River, Winnebago, Tiffin, Newmar, and many more.
Ships US & Canada
UPS shipping calculated at checkout. In-stock, ships within 3 business days from Sarasota, FL. All 50 US states + every Canadian province and territory.
$500 No-Siphon Promise
If fuel is siphoned through a properly installed, registered RV Fuel Vault, we reimburse your insurance deductible up to $500. Plus a 30-day satisfaction guarantee.
Limited Lifetime Warranty
Covers defects for the life of the vehicle on which originally installed. Patent pending. Designed and manufactured in the USA.
Made in the USA
Manufactured in Sarasota, Florida by AMI Transportation, LLC. Canadian representation by GWN Marketing Inc. (Saanichton, BC).
Growing Market, Growing Risk
The Class C motorhome segment is growing 5–7% annually, with North America accounting for nearly half of global demand (Market Research and News, Mordor Intelligence). Gas-powered Class C — built on the Ford E-350 & E-450 chassis — is the dominant sub-segment, meaning millions of RVs sit with an exposed, unlocked fuel cap.
Get in Touch
Have questions about the RV Fuel Vault? We're here to help.
Contact Information
AI Receptionist or Live Person
1.941.732.0452Website
thervfuelvault.com“Drive forever with confidence.”
The RV Fuel Vault™ Team