How to Spot a Clocked Car in the UK: Mileage Checks That Work

"Clocking" means winding back a car's odometer so it shows fewer miles than it has really done. A lower reading makes a car look younger, more valuable and less worn than it is. Digital dashboards have not stopped it. If anything, they make it harder to see.

The good news is that the official records make clocking far easier to catch than it used to be, provided you know where to look. Here is how the trade checks mileage.

Start with the free MOT mileage record

The GOV.UK Check the MOT history of a vehicle service shows the mileage recorded at each MOT test. For cars, results are available for tests done since 2005 (since 2017 for tests in Northern Ireland). That gives you an independent mileage trail recorded by testing stations, not by the seller.

Read the readings in date order and ask three questions:

Does it ever go down? A lower figure than the previous test is the clearest warning sign there is. Occasionally it is a typing error at the test centre, but it must be explained.
Does it fit the story? A car the seller says was "only used for the school run" should not show long-distance annual figures.
Does the current reading follow on? Compare the odometer when you view the car with the last MOT figure and the time since that test. A car that has done a few hundred miles in a year when it previously did many thousands deserves a question.

Remember the record only covers MOT tests. A car under 3 years old will not have one yet, as GOV.UK says an MOT is needed every year once a vehicle is 3 years old. For newer cars, the service history matters more.

Back it up with a private history check

Citizens Advice recommends a private history check, which it says costs up to £20. Among other things, it says this will tell you whether the car is showing the correct mileage, as well as whether it has been reported stolen, has outstanding finance, or has been written off and returned to the road.

Read the paperwork for mileage

Every service stamp, invoice and old MOT certificate is a dated mileage reading. Lay them out in date order alongside the MOT history. Things to watch for:

Invoices with the mileage blanked out or written over.
A service book with stamps all in the same pen, or from garages you cannot find.
A gap in the paperwork that lines up with a gap or oddity in the MOT history.
A "new" service book with no history at all, on a car that is clearly not new.

If the seller says the old book is lost, that may be true. Ask whether the servicing garage can confirm the work and the mileage. A genuine garage keeps records.

Let the car tell you

Wear does not lie as easily as a dashboard. Trade experience says to compare what you can see with the mileage claimed. None of these proves anything on its own, but together they build a picture:

Steering wheel and gear knob: shiny, smooth or worn through on a car claiming low miles.
Driver's Side seat: a flattened or worn bolster where the driver gets in and out, compared with the Passenger Side.
Pedal rubbers: worn smooth, or suspiciously brand new on an otherwise tired car.
Driver's Side door and sill: scuffing on the trim and carpet from years of entry and exit.
Stone chips: heavy chipping on the bonnet and front bumper suggests a lot of motorway miles.

Look at the whole car, not one item. A car can have a new steering wheel for an honest reason. It is when several things disagree with the odometer that you should worry.

What to do if the mileage does not add up

Ask the seller to explain, calmly and directly. If you are not satisfied, walk away. There will be another car.

If you have already bought a car and later discover the mileage was false, you still have options. Citizens Advice says you'll still have legal rights even if you didn't do the proper checks, and gives a false mileage reading as an example of something that may entitle you to a repair, the cost of a repair, or some or all of your money back. Its problem with a used car guidance explains the next steps.

The trade view

Mileage is one of the biggest factors in a used car's price, which is exactly why it gets tampered with. The checks above take perhaps half an hour in total and cost little or nothing. Read our full guide on how to check a used car's MOT history, then our guide to V5C log book checks, or see what is inside Buy It Right.

Facts in this guide are taken from GOV.UK and Citizens Advice, linked above, and were checked on 16 October 2026. Rules change, so always check the official source before you buy. This is general information, not legal advice.