Does The RV Fuel Vault fit the Ram 5500 chassis?

Yes. On the Ram 5500 gas chassis (Dynamax Isata 5) it takes 1 small door plus the single-door security screw pack.

Is the Ram 5500 a diesel?

Not in our lineup. The only RV we fit on the Ram 5500 is the Dynamax Isata 5, which is a gas coach with a single gas cap — no DEF fill.

I have a Dynamax Isata 5 — will it fit?

Yes. Every Isata 5 floorplan uses the same setup: 1 small door plus the single-door security screw pack.

How long does installation take?

8-15 minutes with basic hand tools. No drilling, no cutting.

Limited Lifetime Warranty plus a 30-day satisfaction guarantee.

Is a locking fuel door better than a locking gas cap on a Ram 5500?

Yes. A locking fuel door shields the entire gas filler area, while a locking cap only protects the threads and is easily pried off. The RV Fuel Vault adds a keyed, armored door over the whole fill to stop siphoning, contamination, and tampering.

How much does the Ram 5500 locking fuel door cost and where can I buy it?

The Isata 5 setup is a single small door at $159.95 plus the single-door security screw pack. Shipping is calculated at checkout. Buy it directly at thervfuelvault.com.

The Part the Factory Forgot

Ram 5500 Locking Fuel Door — The Part the Factory Forgot

A locking fuel-door enclosure for the gas Super C on the Ram 5500 chassis — the Dynamax Isata 5.

Order Now — From $159.95

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The RV Fuel Vault — Locking Fuel-Door Enclosure — locking fuel door for motorhomes

Why a Locking Gas Cap Is Not Enough

✖The Dynamax Isata 5 on the Ram 5500 ships with an exposed gas cap — no fuel door
✖A full tank of gasoline is an easy target at campgrounds, rest stops and storage lots
✖Sugar, water or debris in the tank can mean an expensive fuel-system repair
✖Generic locking gas caps are easily defeated and often do not fit the filler neck
✖Neither Ram nor Dynamax offers a locking fuel door from the factory

Why a Locking Fuel Door Beats a Locking Gas Cap

Precision-engineered for the Ram 5500 gas filler configuration
Factory-finished look on your Isata 5
Tamper-resistant keyed lock secures your gas fill
High Impact Reinforced Material — built for Super C ownership
Bolt-on in 8-15 minutes — no drilling, no cutting
Complete setup: 1 small door plus the single-door security screw pack

Before & After: Your RV's Exposed Fuel Cap vs. a Locking Fuel Door

✖ Exposed cap — no security

✓ RV Fuel Vault installed

Why You Need a Locking Fuel Door

Lead with finish. End with security.

Factory-Finished Look

Eliminates the exposed plastic cap. Your rig finally looks production complete.

Fuel Theft Prevention

Keyed lock stops siphoning at campgrounds, rest stops, and storage facilities.

Contamination Defense

Prevents sugar, water, or foreign substances from being added to your fuel tank.

Vandalism Protection

Tamper-resistant design deters opportunistic damage to your fuel system.

How It Installs — 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 Ram 5500 Motorhomes

The Ram 5500 in our lineup is a gas chassis. The Dynamax Isata 5 is the only coach we fit on it — it takes 1 small door plus the single-door security screw pack.

Manufacturer	Models / Floorplans
Dynamax	Isata 5 (gas, all floorplans)

Don't see your model? Use the Fitment Finder — we likely fit your rig.

Frequently Asked Questions

Common questions about The RV Fuel Vault on Ram 5500 motorhomes

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Single Door, Set of 2, or 3-Pack · Limited Lifetime Warranty · 30-Day Guarantee

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Proudly Made in the USA · Patent Pending · In Stock — Ships in 3 Business Days