How to Spot a Clocked Car: Checking Mileage History by Reg(2026)

30 Sep 2026

Clocking - winding back a car's odometer to show fewer miles than it has actually covered - is one of the oldest tricks in the used-car trade, and it has not gone away. If anything it is easier than ever: a cheap tool and a laptop can wipe tens of thousands of miles off a digital dashboard in minutes. A lower mileage means a higher asking price and hidden wear, so it pays every buyer to know how to check.

The good news is that a car's real mileage history is not as hidden as a seller might hope. Here is how to spot a clocked car before you hand over any money.

Is clocking illegal?

Adjusting an odometer is not itself a crime, and there are legitimate reasons a reading might change (for example after a dashboard repair or replacement). What is illegal is selling a car without disclosing that the mileage is wrong or cannot be relied on. Under the Consumer Protection from Unfair Trading Regulations, a trader who passes off a clocked car as genuine is committing an offence, and a private seller must not actively lie about it either. The catch for you as a buyer is that proving it after the sale is hard, so the real protection is checking before you buy.

Check the MOT mileage history first (it is free)

Every MOT test records the car's mileage on the day, and those readings are kept year on year. Laid out in order they tell a story: mileage should climb steadily, roughly 6,000 to 12,000 miles a year for a typical car. What you are looking for is anything that breaks the pattern - a reading that is lower than the one before it, or a year where the mileage barely moved and then jumped again.

You can pull a car's full MOT history in seconds on MotifyMe. Enter the registration for a free check and you will see the MOT record, tax status, DVLA details and an instant valuation, with no sign-up. If the mileage line does not add up, walk away, or at the very least get a full explanation in writing before going any further.

Read the physical signs

The dashboard number should match the wear on the car. On a genuine low-mileage car the driver's seat bolster, steering wheel, gear knob and pedal rubbers all look their age. Warning signs include a worn or shiny steering wheel and pedals on a car claiming 30,000 miles, a sagging driver's seat, or a brand-new set of pedal rubbers that looks suspiciously fresh. None of these is proof on its own, but alongside an odd MOT history they are a strong hint.

Mind the paperwork

Ask to see the service history and match the mileages on the stamps and invoices against the MOT record and the dashboard. Gaps, missing stamps, or a "service book lost" story on an otherwise tidy car are worth questioning. A genuine seller will have nothing to hide.

Go one step further before you buy

The MOT history tells you about mileage, but it does not tell you the whole story of a car. A full vehicle history check, with data provided by Experian, goes deeper and surfaces the things you cannot see on a forecourt: outstanding finance still owed on the car, whether it has been written off by an insurer, a stolen marker, plate changes and the number of previous keepers. For less than the cost of a full tank of fuel it is the difference between hoping a car is what it seems and knowing.

The approach is simple: run the reg through the free check first to see the MOT and mileage history, and if the car still looks right, add the full history check before you commit. Both start from the same place, just enter the registration.

The bottom line

Clocking works because most buyers never check. A two-minute look at a car's MOT mileage history, a careful glance at the wear, and a full history check on anything you are serious about will put you well ahead of the scammers. Check the reg, read the history, then buy with confidence.