How to spot a clocked car
Clocking, winding back the odometer, is not illegal to do, only to sell a car without disclosing it. Digital dashboards made it a five-minute job with a laptop, and it adds thousands to a car’s apparent value. The good news is that the evidence is public and free.
Updated 14 October 2026
The MOT history is the whole answer
Every MOT test since 2005 records the odometer reading, and those readings are published. Plot them in order and a clocked car is obvious: the line dips, flattens, or jumps in a way that no real car does.
A genuine odometer only counts up. A later reading lower than an earlier one means either a replaced instrument cluster (legal, and the seller should say so) or the mileage was wound back.
Watch for a long flat section too. A car that covered 12,000 miles a year for six years and then 900 miles in the two years before sale is telling you something.
What the car itself tells you
Wear does not lie as easily as a dashboard. On a car claiming 40,000 miles, look at:
The driver’s seat bolster, the steering wheel rim, and the pedal rubbers. Shiny, smooth or worn through is a 100,000-mile interior.
The gear knob and the indicator stalk, both get touched constantly.
Stone chips on the bonnet and windscreen. Motorway miles leave marks.
Service stamps and their dates. Cross-check the mileage written in the book against the MOT record for the same month.
What to do if the numbers are wrong
Ask the seller directly, and watch the answer. A replaced instrument cluster is a legitimate explanation and comes with a receipt.
If the explanation does not hold, walk away. A clocked car is worth far less than the asking price, may have skipped the servicing its real mileage required, and buying one knowingly makes you the person who has to disclose it next time.
You can report suspected clocking to Trading Standards through Citizens Advice.
Checking it quickly
Odomint plots every MOT odometer reading on one line, free, for any registration. A dip or a flat spot is visible at a glance without reading a single number, which is exactly the kind of thing no £19.99 report bothers to present well.
An Odomint Check does not add a second mileage source: the MOT record is the mileage evidence, and it is free. What the check adds is everything the MOT cannot tell you: whether money is owed on the car, whether an insurer has written it off, and whether it is recorded as stolen.
Common questions
Is clocking a car illegal?
Adjusting an odometer is not itself illegal, but selling a car without disclosing that it has been adjusted is: it is an offence under consumer protection law.
Can I check a car’s mileage history for free?
Yes. Every MOT since 2005 records the odometer reading and those are public. Odomint plots them for any registration at no cost.
What if the mileage dropped because the dashboard was replaced?
That is legitimate and reasonably common, but the seller should volunteer it and should have the receipt for the replacement. Ask to see it.
Check any car before you buy it
MOT history, every advisory and the full mileage record are free for any UK registration. An Odomint Check adds outstanding finance, insurance write-offs, stolen markers and salvage history, with a £10,000 data guarantee.