DEF Theft Prevention for Your Motorhome
Diesel exhaust fluid (DEF) is stolen or contaminated more often than diesel itself \u2014 and a single bad fill can destroy your entire emissions system. The RV Fuel Vault 3-Pack includes an armored, keyed DEF tank cover built for Super C and diesel motorhomes.
The Problem
- ✖DEF can be siphoned or contaminated in seconds — the exposed blue cap is on the same side of the chassis as the fuel cap
- ✖A single improper fill (water, sugar, diesel, windshield washer) destroys the SCR catalyst and exhaust sensors — $8,000–$20,000+ to repair
- ✖Insurance rarely covers emissions damage from tampering — the owner pays out of pocket
- ✖With the engine in regen or limp-mode, a contaminated DEF tank will strand a $400k motorhome in the middle of a trip
- ✖The blue DEF cap is an ugly, exposed eyesore on otherwise finished Super C, Class C, and Class A chassis
The Solution
- The RV Fuel Vault 3-Pack includes an armored DEF tank cover — same patent-pending keyed lock as the diesel fuel doors
- Armored 3/16″ fiber-filled polymer physically seals the DEF fill neck — nothing goes in or out without the key
- Tamper-proof keyed lock — same key opens diesel and DEF doors for fast fills
- Eliminates cross-fill risk at busy truck stops — no more sleep-deprived mistakes with the wrong cap
- Bolt-on install with no modifications to your motorhome chassis
- 3-Pack with DEF cover: $224.95 pre-order (save $75 off retail). Limited Lifetime Warranty. Made in Sarasota, Florida.
Pre-Order Today — Starting at $84.95
Single Door, Set of 2, or 3-Pack · Free shipping · Limited Lifetime Warranty · 30-day guarantee
Pre-Order NowProudly Made in the USA · Patent Pending 19/632,042