Car clocking and mileage fraud
RegVerdict guide·6 min read·Reviewed 17 June 2026
How odometer fraud works, the tell-tale signs, and how to check a mileage history for rollbacks.
Clocking, sometimes called mileage correction, is the practice of altering a car's odometer so it shows fewer miles than the vehicle has actually covered. A lower mileage makes a car look less worn and worth more, so clocking is simply a way to inflate the price. It is one of the most common forms of used-car fraud, and modern digital dashboards have made it faster and harder to spot.
Why people clock cars
- To raise the sale price. Mileage is one of the biggest factors in a car's value, so knocking off tens of thousands of miles can add hundreds or thousands of pounds.
- To dodge finance penalties. PCP and lease agreements charge for exceeding an agreed mileage, which tempts some people to wind the figure back before returning or selling the car.
- To hide heavy use. A high-mileage ex-fleet or private-hire car can be made to look like a gently used runabout.
Is clocking illegal?
Adjusting an odometer is not in itself illegal, and there are honest reasons to do it, such as replacing a broken instrument cluster. The offence is selling a car without disclosing that the mileage is wrong. That breaches the Consumer Protection from Unfair Trading Regulations 2008 and can be prosecuted as fraud. The problem is that cheap digital tools can rewrite a modern dashboard in minutes, leaving little physical evidence behind.
The warning signs of a clocked car
- Wear that does not match the mileage. A shiny worn steering wheel, smoothed pedal rubbers, a sagging driver's seat or a polished gear knob on a car claiming very low miles.
- An implausibly low annual figure. A typical UK car covers roughly 7,000 to 9,000 miles a year. A ten-year-old car showing 30,000 miles needs a very good, evidenced explanation.
- Gaps or jumps in the service history. Service stamps with mileages that do not line up, or long unexplained gaps.
- Signs of dashboard tampering. Scratches or marks around the instrument cluster, mismatched screws, or a cluster that looks newer than the car.
- MOT readings that fall. The clearest signal of all, covered next.
How to check a car's mileage history
Every MOT test records the odometer reading, and the free MOT history service on gov.uk lists them by date. Read the readings in order: each one should be the same as, or higher than, the previous test. A reading that goes down, or a gap with barely any miles added, points to clocking. The catch is that doing this by eye is easy to get wrong, especially with imported cars whose early readings may be recorded in kilometres.