What Happens If Someone Messes With Your RV's DEF Tank?

## What Happens If Someone Messes With Your RV's DEF Tank? **A contaminated DEF tank can destroy your motorhome's entire emissions system — costing $8,000 to $20,000+ to repair.** Diesel Exhaust Fluid (DEF) is required by every modern diesel engine, and the blue DEF cap on your Super C motorhome is just as exposed as your fuel cap. Insurance rarely covers this type of damage. ### What Can Go Wrong With Your DEF Tank - **DEF theft:** Thieves steal DEF to sell or use in their own vehicles - **Cross-contamination:** Wrong fluid accidentally put in DEF tank at truck stops - **Intentional sabotage:** Vandals pour water, sugar, or other fluids into the exposed blue cap ### What a DEF System Repair Costs | Component | Typical Cost | |---|---| | SCR catalyst replacement | $3,000–$8,000 | | DEF injector replacement | $800–$2,000 | | NOx sensor replacement | $500–$1,500 | | DEF tank flush | $500–$1,000 | | **Total potential damage** | **$5,000–$20,000+** | ### How to Protect Your DEF Tank **The RV Fuel Vault 3-Pack** includes a dedicated DEF cap cover with the same tamper-resistant keyed lock. Same key opens all three covers. - Armored 3/16" fiber-filled polymer seals the DEF filler neck - Eliminates cross-fill risk at truck stops - Bolt-on install with no modifications **3-Pack with DEF Cover: $299.95** — less than 3% of the potential repair cost. **[Protect your DEF tank →](/#pre-order)** *Patent Pending · Made in Sarasota, Florida*