Rolling back or replacing an odometer to hide a vehicle's true mileage is a federal offence, and every transfer of a vehicle must come with a written mileage statement the buyer can sue over if it is false.
Federal law makes it illegal to disconnect, reset or alter a vehicle's odometer with intent to change the mileage it shows, to sell a device for doing so, or to operate a vehicle knowing its odometer is disconnected. Because mileage drives price, the law also requires that when ownership of a motor vehicle is transferred the seller give the buyer a written disclosure of the odometer reading, on the title or a prescribed form, stating whether it is accurate, known to be wrong, or beyond the odometer's mechanical limits. Newer vehicles are exempt from the disclosure only after a fixed age set by regulation, which was extended substantially in 2021.
A buyer harmed by a false disclosure or a tampered odometer has a private right of action in federal or state court and may recover a multiple of their actual loss or a fixed statutory minimum, whichever is greater, plus attorney's fees - which is what makes an individual case worth bringing. The claim requires intent to defraud, but courts have found that intent from a seller's reckless disregard of obvious signs that the mileage was wrong.
Digital odometers did not end the problem; they moved it into software. The practical protections are the title history, a vehicle-history report showing the mileage recorded at each prior sale, inspection and registration, and a comparison of that history with the wear on the vehicle.
If the history report and the title disclosure disagree with each other, or with the car, that is the evidence, and a lawyer can tell you whether the seller's conduct meets the intent standard and whether the dealer or the prior owner is the right defendant. Because fees can be recovered, consumer lawyers take these cases on vehicles that are not expensive.
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