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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 gas Ram 5500 chassis. Dynamax left the fuel cap completely exposed. One small RV Fuel Vault door plus the single-door security screw pack is the exact-fit locking enclosure your Isata 5 needs.

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

Why a Locking Gas Cap Is Not Enough

  • ✖Your Dynamax Isata 5 has an exposed, unlocked fuel cap — no factory fuel door on the Ram 5500
  • ✖A full tank of gas is an easy target for thieves at campgrounds and storage lots
  • ✖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

Why a Locking Fuel Door Beats a Locking Gas Cap

  • Factory-finished look — eliminates the exposed fuel cap on your Isata 5
  • One small door plus the single-door security screw pack — that is the complete Isata 5 setup
  • Precision-engineered for the Dynamax Isata 5 on Ram 5500 filler configuration
  • Tamper-resistant keyed lock secures your fuel system
  • High Impact Reinforced Material — 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

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

Exposed cap on Isata 5 — no security — exposed RV fuel cap before locking fuel door
✖ Exposed cap on Isata 5 — no security
RV Fuel Vault installed — sealed and locked — RV Fuel Vault locking fuel door installed
✓ 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 cap 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.

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 (Dynamax Isata 5) Motorhomes

The Dynamax Isata 5 is a gas coach built on the Ram 5500. Its single fuel cap is completely exposed from the factory — it takes 1 small door plus the single-door security screw pack.

ManufacturerModels / Floorplans
Dynamax Isata 5All 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 · Limited Lifetime Warranty · 30-Day Guarantee

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