How to Spot a Clocked Car — Mileage Fraud Explained

Around 400,000 clocked cars are sold in the UK every year, costing buyers an average of £3,000 each in inflated prices and unexpected repair bills. Mileage fraud is one of the most common forms of used car fraud — and one of the easiest to detect if you know what to look for.

What Is a Clocked Car?

A clocked car is one where the odometer has been tampered with to show a lower mileage than the car has actually done. Modern digital odometers can be reset using OBD tools available online for as little as £50, making this fraud alarmingly easy to commit.

A car with 120,000 miles clocked to show 45,000 miles might sell for £6,000–£10,000 more than it's worth. The buyer then faces unexpected maintenance costs as worn components fail prematurely.

The Most Reliable Detection Method: MOT History

The MOT history is your best defence against clocking. Every MOT test in the UK records the mileage at the time of the test. If the mileage goes backwards between any two tests, the car has been clocked.

→ Check any car's MOT history free — enter the reg plate

How to check:

1. Open the MOT history and note the mileage at each test date
2. The mileage should increase consistently year on year
3. Any decrease in mileage is definitive proof of clocking
4. An unusually large jump (e.g., 30,000 miles in 6 months) may indicate the car was heavily used before being clocked

Real example: A 2017 BMW 3 Series listed with 38,000 miles. MOT history showed 61,000 miles recorded 18 months earlier. The car had been clocked by at least 23,000 miles.

Physical Signs of Clocking

While MOT history is the most reliable method, physical inspection can also reveal clocking:

Steering wheel and gear knob wear — high-mileage cars show wear on the steering wheel, gear knob, and pedal rubbers. If a "low mileage" car has a worn steering wheel, something doesn't add up.

Service stickers — check the inside of the door jamb and under the bonnet for service stickers. These often record the mileage at the time of the service. If a sticker shows 90,000 miles but the odometer reads 40,000, the car has been clocked.

Brake disc wear — brake discs wear in proportion to mileage. Heavily worn discs on a "low mileage" car are a significant red flag.

Seat wear — driver's seat bolster wear is a good indicator of mileage. Significant bolster wear on a supposedly low-mileage car is suspicious.

AI-Powered Mileage Analysis

CarLook AI automatically analyses mileage consistency across the MOT history and flags any anomalies. Our AI compares the claimed mileage against the MOT records and the expected mileage for the car's age and type.

→ Get an AI mileage analysis for any car — £4.99 full report

What to Do If You Suspect Clocking

1. Check the MOT history — this is your first and most important step
2. Ask the seller directly — their reaction can be telling
3. Walk away — if the MOT history shows mileage inconsistencies, don't buy the car at any price
4. Report it — selling a clocked car is a criminal offence under the Fraud Act 2006

CarLook AI uses official DVSA MOT data. Our AI analysis flags mileage anomalies automatically.