Three kinds of problems hide well in a used car listing: water damage, a title that was cleaned up in another state, and mileage that is not what the dash says. All three are more common than most buyers think. Here is how to check for each.
The short version
- Up to 120,000 Florida cars were flood-damaged by Hurricane Milton alone.
- Flood cars come back onto the market “often without proper disclosure”, in the words of the insurance industry’s own crime bureau.
- Even the federal title system catches cars that were totaled and never branded.
- NHTSA says more than 450,000 cars a year are sold with false odometer readings.
Flood cars
Carfax counted as many as 347,000 vehicles flood-damaged in the 2024 hurricane season, including up to 120,000 in Florida from Milton (Carfax, October 2024). As of August 2025 it estimated about 530,000 flood-damaged vehicles on U.S. roads. The National Insurance Crime Bureau, which is funded by insurers, warns that these cars “frequently reenter the used car market following major disasters, sometimes hundreds of miles from where the flooding occurred and often without proper disclosure” (NICB, August 2026).
How to check: run the VIN through the NICB’s free VINCheck and a history report. Then look yourself: lift the carpet at the seat rails and in the trunk for silt or rust, smell for mustiness that air freshener is covering, check for fogging inside headlights and taillights, and look at exposed metal under the dash for corrosion. An insured flood car gets a branded title. A car whose owner never filed a claim, or whose insurer was out of state, may not.
Washed titles
Title washing is moving a car with a salvage, flood or rebuilt brand to a state that does not carry the brand over, then registering it there with a clean title. Carfax put the number of title-washed cars at about 800,000 back in 2014; no newer public count exists (Carfax, August 2014). The federal title database, NMVTIS, now covers more than 99% of registered vehicles, and its own annual report still describes states finding “vehicles being a total loss with no brand in the title” (U.S. Department of Justice, NMVTIS FY2023 Annual Report).
How to check: a history report shows the title history across states. Several title changes across state lines in a short time is the pattern to look for. A car that was totaled and then reappears with a clean title in a new state deserves a very good explanation.
Rolled-back odometers
Digital odometers did not end mileage fraud. NHTSA says more than 450,000 vehicles are sold each year with false odometer readings, costing buyers over $1 billion a year (NHTSA consumer advisory). Federal courts have put the loss at about $4,000 per car (U.S. Department of Justice, Odometer Fraud).
How to check: compare the mileage on the dash with every reading on the history report; each inspection, service visit and title transfer records one. Then compare it with the car itself. A worn steering wheel, shiny pedals, a sagging driver’s seat or a brake pedal rubber worn through on a car showing 40,000 miles do not add up. Ask for service records and read the mileage on each one.
Airbags that went off
One more thing the listing will not mention. Carfax estimates nearly 2 million vehicles are back on U.S. roads after a crash in which an airbag deployed, about 106,000 of them in Florida (Carfax, July 2024). Who replaced the airbag, and with what, is a question for whoever owned the car at the time.
The question behind all three
Each of these checks tells you that something happened. None tells you the story: how deep the water was, why the title crossed state lines, who serviced the car and when. The previous owner knows. Our team finds them and asks, and your report marks each answer Verified or Owner-reported.
Related: What Carfax can’t tell you · How to get a used car inspected
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