How to spot a clocked car

Last reviewed 22 October 2026. General information, not legal advice.

“Clocking” means winding back a car’s mileage so it looks less used than it is. A lower reading adds to the price and hides wear that’s due for expensive work. Digital dashboards haven’t stopped it, but the records most cars leave behind make it much easier to catch.

1. Compare the MOT mileage readings

Every MOT test since 2005 records the odometer reading, and the records are public. Line them up oldest to newest. The mileage should only ever go up. A reading that drops and then carries on from the lower figure is the classic sign of clocking. A single reading that looks wildly out of line, with the readings either side carrying on normally, is more often a typing mistake at the test.

Our free check does this for you. It draws the mileage on a chart, flags drops, big jumps and long gaps between tests, and says which drops look like typos.

2. Watch for long gaps

A gap of more than a year and a half between tests can be innocent: the car was off the road (SORN), abroad or laid up. But a gap is also where a mileage change can hide, so ask the seller why.

3. Check the service history against the MOTs

• Service book stamps and garage invoices usually record the mileage. They should fit between the MOT readings.
• Ring a garage that stamped the book and ask them to confirm the date and mileage. Most will.
• Missing history isn’t proof of clocking, but a car with high-value paperwork removed deserves suspicion.

4. Look at the wear

Compare the condition with the claimed mileage. A shiny, worn steering wheel, gear knob or pedal rubbers, a sagging driver’s seat bolster, or heavily stone-chipped paint at the front all suggest more miles than a low reading claims. Scratches or marks around the instrument panel can mean it has been removed.

5. Read the paperwork

• The V5C logbook shows the number of previous keepers and when the car was registered. Many keepers and a low mileage is worth questioning.
• Old MOT certificates, receipts and the handbook pack sometimes have readings on them too.
• A paid vehicle history check can add mileage records from other sources, such as dealers and auctions.

If something doesn’t add up

Ask the seller to explain. A replaced instrument cluster is a genuine reason for a mileage change, and an honest seller will have the paperwork. If the answers don’t convince you, walk away. Adjusting an odometer isn’t illegal in itself in the UK, but selling a car with a false mileage while hiding it can be a criminal offence, and it gives the buyer a claim against the seller. If you think you’ve already bought a clocked car from a trader, Citizens Advice can help you report it to Trading Standards.

More guides

• What to check before buying a used car
• What an MOT checks, and how to pass first time
• When is my MOT due?
• MOT advisories explained