Flood-Damaged Cars: How to Check Before You Buy

Every hurricane season pushes tens of thousands of flooded vehicles into the used-car market. Many are dried out, cleaned up, moved across state lines and resold to buyers who never learn the car spent days underwater. Flood damage is uniquely nasty because it hides: corrosion eats wiring harnesses, connectors and airbag modules from the inside, and the failures surface months after the sale, long after the seller is gone.

The defense is a 15-minute routine. Smell the interior with the doors closed (mustiness is hard to mask), lift the carpet and check for silt in the seat tracks and spare-wheel well, look for fogged headlights and corrosion on exposed screws under the dash, and be suspicious of a freshly shampooed interior in an older car. Then check the paper trail: flood and salvage title brands, a title that recently moved states — especially from a hurricane state — and whether the odometer story holds together.

The guides below cover each check in detail. Before you pay for any car, run its 17-character VIN through Carchieve to see its recall, complaint and safety record — and treat any car whose history you can't verify as priced too high, whatever the asking price.