In short
- Clocking means winding back a car’s mileage reading so it seems to have done fewer miles.
- Every MOT since 2005 records the mileage (Northern Ireland tests only from 2017), and you can see the record free on GOV.UK. The reading should rise at every test[1].
- A drop, or a reading well below what is usual for the age, is a reason to ask questions. It isn’t proof: in 2023, DVSA said it gets over 14,000 requests a year to correct mileage mistakes[2].
- Selling a car on a false mileage can be a crime. A dealer sale also gives you stronger rights than a private one.
- If the numbers don’t add up, ask the seller for paperwork before you decide. Without it, there is no way to tell which reading is right.
On this page
- What is mileage clocking, and how common is it?
- How an MOT history shows a wound-back mileage
- Warning signs in the MOT record
- What normal mileage looks like
- A made-up example
- The law on mileage clocking
- How to protect yourself
- What to do if the mileage doesn’t add up
- Check a car’s mileage story
- Common questions
- Sources
Clocking means winding back a car’s mileage reading so it seems to have done fewer miles than it has. A car that looks as if it has done fewer miles can sell for more. The buyer then pays for wear that the reading doesn’t show.
Nobody knows exactly how common it is. In October 2025, Auto Express reported that the diagnostics firm Carly had checked 2.5 million UK cars with its plug-in tool. Carly said 16.25% showed a mismatch in the displayed mileage or the VIN (the chassis number)[3].
A mismatch is a reason to ask questions. It isn’t proof that the mileage was wound back. These are cars checked with one firm’s tool, not a sample of every car on the road.
Every MOT records the mileage reading on the day. For cars, GOV.UK shows the reading from every test since 2005 (Northern Ireland tests only from 2017), free[1]. It should go up steadily, year after year.
The tester types the reading in. The MOT system compares it with the last test and warns if it is the same, lower or much higher. The tester must then confirm it or change it[2]. So the record shows what the tester entered. It isn’t a separate check by DVSA.
| What you see | What it can mean |
|---|---|
| A mileage drop | A typing mistake at the test, a replaced dashboard unit, or a clock wound back. The record can’t show which. What to ask: Ask for paperwork: a corrected MOT record, or a receipt for the new dashboard unit (the unit that shows the mileage). |
| A year with far fewer miles than the others | A car that sat unused, or a reading that was too low at one test. What to ask: Ask what happened that year, and ask to see the service record. |
| A year with no MOT, then a lower reading | A car kept off the road, or a reading changed while there was no test on record. What to ask: Ask when the car was off the road. There is more in gaps in an MOT history. |
| A reading well below what is usual for the age | A little-used car, or a reading that is too low. What to ask: Compare it with the table below, then ask to see the service history. |
None of these proves clocking. Read with the service record and the car’s condition, they show whether the story holds together.
To spot a clocked car, it helps to know what is usual. This table comes from our analysis of DVSA MOT results: the mileage readings on MOTs in the latest full year we hold. Our guide to average mileage by car age has the full table and what high and low readings can mean.
This example is made up, to show the pattern. Imagine a 2016 Ford Focus advertised at 38,000 miles, for a price that seems low. The MOT history shows this:
| Test date | Mileage reading |
|---|---|
| June 2019 (age 3) | 31,204 Miles since the last test: First test |
| June 2020 (age 4) | 42,018 Miles since the last test: 10,814 more |
| June 2021 (age 5) | 53,691 Miles since the last test: 11,673 more |
| June 2022 (age 6) | 64,382 Miles since the last test: 10,691 more |
| No test in 2023 | No reading Miles since the last test: A gap |
| July 2024 (age 8) | 38,102 Miles since the last test: 26,280 fewer |
Made up for this guide. It is not a real car.
The car did a steady 10,000 to 12,000 miles a year. Then a year is missing, and the reading falls by 26,280 miles. A drop that size after a gap could mean the reading was wound back while there was no MOT on record. It could also have an innocent cause, such as a replaced dashboard unit. Ask the seller for paperwork that explains it.
If the reading was wound back, the car may really have covered 80,000 to 90,000 miles. At the advertised 38,000, the price could be too high.
This is general information, not legal advice. For your own case, speak to Citizens Advice or a solicitor.
Selling a car on a false mileage can be a crime, and a buyer has rights to put things right. Three laws matter most:
- Digital Markets, Competition and Consumers Act 2024. Since 6 April 2025, a trader who misleads buyers, including about a car’s mileage, can commit an offence[4]. Trading Standards enforces it in Great Britain, and the Department for the Economy does in Northern Ireland[5]. The Competition and Markets Authority can act too[5]. The most serious cases can bring up to two years in prison, a fine, or both (as of 10 October 2026)[4]. Before 6 April 2025, similar rules were in the Consumer Protection from Unfair Trading Regulations 2008[6]. Buyers’ rights to redress under the old rules stay in force for now[6].
- Fraud Act 2006. Covers anyone, including a private seller, who dishonestly makes a false statement to gain or cause loss[7]. It applies in England, Wales and Northern Ireland[8]. It does not cover Scotland.
- Consumer Rights Act 2015. Gives you civil rights against a dealer. A car must match its description, including its mileage[9]. You may be able to reject it within 30 days of getting it[10]. Our guide to your rights when buying a used car sets out what comes after that.
Prosecutions do happen. In a case reported in January 2025, Kent Trading Standards prosecuted three people. They had wound back 23 high-mileage vehicles, removing about 2 million miles[11].
The MOT history is the first check. These make it stronger.
Mileage checks before you decide
0 of 6 done
The National Mileage Register is a database of readings supplied by sources such as manufacturers, dealer groups and the DVLA. The firm that holds it says the readings are supplied by others and it can’t validate them[18]. The service history and the MOT record still matter.
For a step-by-step guide that covers more than mileage, see our used car buying checklist. For the conversation with the seller, see questions to ask a seller.
- Before you decide. An unexplained drop or gap is a question for the seller. Paperwork can answer it: a corrected MOT record, or a receipt for a replacement dashboard unit. Without paperwork, there is no way to tell which reading is right. How much that matters is your call.
- If it is a genuine mistake. A wrong reading can be put right. Within 28 days of a test, the test centre can correct it. After that, it can be reported to DVSA with evidence of the right reading, dated within a day of the test[19]. A corrected record is the paperwork to ask for.
- After buying from a dealer. A car with a false mileage does not match its description. You may be able to reject it within 30 days, and there are other remedies after that. See your rights when buying a used car.
- After buying privately. The car must still be as described. If the seller gave a mileage that turns out to be false, you may have grounds for a claim. Report it as set out below, and think about getting legal advice.
- In every case. Report suspected clocking to Trading Standards. In England and Wales, use the Citizens Advice consumer service[14][15]. In Scotland, use Advice Direct Scotland[16]. In Northern Ireland, Consumerline can help with a complaint against a trader[17]. Trading Standards looks into businesses, including sellers who are really traders. It decides whether to investigate, and cannot help you get a refund[14]. Keep your evidence: screenshots of the MOT history, the advert, messages with the seller, and photos of the car’s condition.
Every car’s MOT history tells a mileage story. To see what a good record looks like beyond mileage, read what a good MOT history looks like. To see how we sum up a whole record, read how to read a vehicle risk rating.
Common questions
How common is mileage clocking in the UK?
Nobody knows for sure. In October 2025, Auto Express reported that Carly, a diagnostics firm, had checked 2.5 million UK cars with its plug-in tool. Carly said 16.25% showed a mismatch in the mileage or VIN. A mismatch is a reason to ask questions, not proof of clocking, and these are cars checked with one firm’s tool.
Is mileage clocking illegal in the UK?
Selling a car on a false mileage can be a crime. Dealers can be prosecuted under the Digital Markets, Competition and Consumers Act 2024 (since 6 April 2025). Anyone can face fraud charges. If you bought from a dealer, the Consumer Rights Act 2015 lets you reject a car that does not match its description. You may be able to do that within 30 days of getting it, and other remedies follow after that. This is general information, not legal advice. For your own case, speak to Citizens Advice or a solicitor.
How can I check if a car has been clocked?
Check the MOT history on GOV.UK. Every MOT since 2005 records the mileage (Northern Ireland tests only from 2017), and it should rise steadily. A drop, a long gap or a reading that looks very low for the car’s age is a warning sign, not proof. The MOT Wise check points out readings that don’t add up.
Does a lower mileage on an MOT always mean clocking?
No. A tester may mistype the reading or read the wrong dial. In 2023, DVSA said it gets over 14,000 requests a year to correct mileage mistakes. A replaced dashboard unit can also change the reading. Ask the seller for paperwork that explains it.
What should I do if I think I have bought a clocked car?
Keep the evidence, such as the MOT history, the advert and your messages with the seller. Report it to Trading Standards. In England and Wales, use the Citizens Advice consumer service. In Scotland, use Advice Direct Scotland. In Northern Ireland, Consumerline can help with a complaint against a trader. Trading Standards looks into businesses, including sellers who are really traders. If you bought from a dealer, you may have rights under the Consumer Rights Act 2015, and Citizens Advice can explain them.
Sources
- Check the MOT history of a vehicle. GOV.UK (DVSA).
- Improving mileage recording errors in the MOT Testing Service. DVSA, Matters of Testing blog, 2023.
- 1 in 7 UK used cars are clocked or have hidden identities. Auto Express, 2025. Reports Carly’s check of 2.5 million cars. The headline gives a ratio; the article gives 16.25%.
- Digital Markets, Competition and Consumers Act 2024, Part 4, Chapter 1 (unfair commercial practices). legislation.gov.uk, 2024.
- Digital Markets, Competition and Consumers Act 2024, section 231 (public enforcement). legislation.gov.uk, 2024.
- Unfair commercial practices (CMA207). Competition and Markets Authority, GOV.UK, 2025.
- Fraud Act 2006, section 2 (fraud by false representation). legislation.gov.uk.
- Fraud Act 2006, section 15 (commencement and extent). legislation.gov.uk.
- Consumer Rights Act 2015, section 11 (goods to be as described). legislation.gov.uk.
- Consumer Rights Act 2015, section 22 (time limit for the short-term right to reject). legislation.gov.uk.
- Car clocking gang sentenced. Chartered Trading Standards Institute (journal), 2025.
- Sale of Goods Act 1979, section 13 (sales by description). legislation.gov.uk.
- Sale of Goods Act 1979, section 14 (implied terms about quality or fitness). legislation.gov.uk.
- Reporting to Trading Standards. Citizens Advice.
- Reporting to Trading Standards (advice for Wales). Citizens Advice.
- Reporting to Trading Standards (advice for Scotland). Citizens Advice.
- Contact Consumerline to make a complaint or ask for advice. nidirect.
- Mileage check help: the National Mileage Register. HPI Check.
- Getting an MOT: fix mistakes on your MOT record. GOV.UK (DVSA).
