How to check car mileage history (UK)
A car's mileage is one of the most important inputs into its value. It is also one of the easiest things for a dishonest seller to fake. Every year, tens of thousands of UK cars are sold with "clocked" odometers. The good news is that the UK has a strong paper trail — MOT records and industry mileage databases make it possible to verify mileage independently.
Step 1: Check the MOT history
Every UK MOT records the mileage at the time of the test. The free MOT check will show you every recorded reading. Look for a steady, rising pattern. Any drop or sudden plateau is a red flag.
Step 2: Cross-check against the industry mileage database
The industry National Mileage Register holds additional readings from servicing, dealer inspections and finance applications. A proper mileage check pulls from both MOT records and the industry register. Carpeep includes full mileage history in every £15 report.
Step 3: Read the warnings
- Mileage discrepancy — two readings do not line up.
- Clocked mileage — the odometer has been wound back.
- Odometer rollback — confirmed rollback on record.
- Inconsistent mileage — pattern does not match expected use.
What to do if mileage is flagged
- Ask the seller for service invoices that explain each recorded reading.
- If the seller cannot explain the drop, walk away.
- Adjust your offer downwards significantly — clocked cars lose value permanently.
Frequently asked questions
Is the free MOT check enough on its own?
It is a good first pass but only shows MOT readings. Readings between MOTs — from servicing and finance applications — sit in the industry database and need a paid report.
Is clocking illegal in the UK?
Selling a car with falsified mileage is a criminal offence under the Consumer Protection from Unfair Trading Regulations. Proving it after the sale is harder than preventing it beforehand.
How much value does a clocked car lose?
Expect a permanent 20–40% hit to resale, plus harder-to-find buyers and a more difficult insurance claim if ever required.