Does The RV Fuel Vault fit the Dynamax Isata 5 on Ram 5500?

Yes. It is engineered specifically for the Ram 5500 chassis filler configuration used in the Isata 5.

Will it fit every Isata 5 floorplan?

Yes. All Isata 5 floorplans share the same Ram 5500 chassis and filler configuration.

How long does installation take?

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

Does it also fit the Grand Design Lineage?

Yes. The Lineage is also built on the Ram 5500 chassis with the same filler configuration.

Limited Lifetime Warranty plus a 30-day satisfaction guarantee.

Built for the Isata 5

Dynamax Isata 5 Locking Fuel Door — Secure Your Ram 5500 Super C

The Dynamax Isata 5 is a premium Super C built on the Ram 5500 chassis with the Cummins 6.7L diesel. Dynamax left the fuel caps completely exposed. The RV Fuel Vault is the exact-fit armored locking enclosure your Isata 5 needs.

The RV Fuel Vault — Dynamax Isata 5 — locking fuel door for motorhomes

The Problem

✖Your Dynamax Isata 5 has exposed, unlocked fuel caps — no factory fuel door on the Ram 5500
✖The Cummins 6.7L diesel carries a large fuel supply — an easy target for thieves
✖Fuel contamination from tampering can cause catastrophic engine damage and costly repairs
✖Generic locking caps are easily defeated and only protect one filler at a time
✖Road debris and splash-back damage the finish around your exposed filler area

The RV Fuel Vault Solution

Factory-finished look — eliminates exposed fuel caps on your Isata 5
Precision-engineered for the Dynamax Isata 5 on Ram 5500 filler configuration
Tamper-resistant keyed lock secures your fuel system
High-strength fiber-filled polymer — built to match the Isata 5's premium quality
Bolt-on in 8-15 minutes — no drilling, no cutting, no modifications
Corrosion-proof construction rated for year-round use in any climate

See the Difference

✖ Exposed caps on Isata 5 — no security

✓ RV Fuel Vault installed — sealed and locked

Why You Need a Locking Fuel Door

Lead with finish. End with security.

Factory-Finished Look

Eliminates the exposed plastic caps on your Isata 5. Looks factory-installed.

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.

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 Ram 5500 (Dynamax Isata 5) Motorhomes

The Dynamax Isata 5 is built on the Ram 5500 with the Cummins 6.7L diesel. The fuel caps are completely exposed from the factory.

Manufacturer	Models / Floorplans
Dynamax Isata 5	All floorplans on Ram 5500
Grand Design Lineage	All floorplans on Ram 5500

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Frequently Asked Questions

Common questions about The RV Fuel Vault on Ram 5500 (Dynamax Isata 5) motorhomes

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

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Proudly Made in the USA · Patent Pending 64/085,223 · Est. delivery by July 4, 2026