Car clocking — the illegal practice of winding back a car's odometer to make it appear lower-mileage than it really is — remains a serious problem in the UK. Estimates suggest that up to 2.3 million clocked cars are on UK roads, costing buyers an average of £1,000 per vehicle in inflated prices.
What is Car Clocking?
Clocking involves tampering with a vehicle's odometer to reduce the displayed mileage. With modern digital odometers, this can be done in minutes using cheap software and an OBD plug. It's illegal under the Consumer Protection from Unfair Trading Regulations 2008, but it's notoriously difficult to prosecute.
How to Spot a Clocked Car
1. Check the MOT History
This is the single most reliable method. Every MOT test records the odometer reading. If the mileage ever decreases between tests, the car has been clocked. You can check any car's MOT history for free with MOTChecker, including our mileage anomaly detection that flags suspicious patterns automatically.
2. Look for Wear and Tear Mismatches
A car showing 30,000 miles shouldn't have a heavily worn steering wheel, shiny pedal rubbers, or sagging seat bolsters. Compare the physical condition to the claimed mileage — if the interior looks like it's done 100,000 miles, it probably has.
3. Check Service History
Service stamps and invoices record mileage at each visit. Cross-reference these with the MOT history and current odometer. Any inconsistencies are a red flag.
4. Inspect the Exterior
Stone chips on the bonnet and bumper indicate high motorway mileage. A car claiming low mileage but covered in stone damage has likely done far more than stated.
5. Be Suspicious of Unusually Low Mileage
The average UK car covers around 7,000 miles per year. A 10-year-old car with only 20,000 miles should raise questions — not because it's impossible, but because it's statistically unusual and worth verifying thoroughly.
Protect Yourself
Always run a free car check before buying any used car. Our mileage history chart plots every recorded reading over time, making it easy to spot discrepancies that might not be obvious from the MOT certificate alone.