Clocked car: how to spot false mileage and what to do

A low reading is reassuring only when the history supports it.

The answer in 2 lines. A clocked car displays a misleadingly reduced mileage. Before buying, compare the dashboard reading with MOT entries, servicing invoices and the seller's written description. A discrepancy can also be a recording error or follow an instrument replacement, so investigate rather than assuming fraud. After buying, preserve the evidence and write to the seller promptly. Your options depend on the facts and whether you bought from a trader or a private individual.

Start with the evidence

Enter the registration in the GOV.UK MOT-history service. Read the recorded mileage in date order and check whether each entry uses miles or kilometres.
Compare the history with the current display, servicing invoices and any instrument-replacement paperwork. Note exactly where the records disagree.
Save the advert and messages. Ask the seller to confirm the claimed mileage and any uncertainty in writing before you pay.

Stop: danger

Possible missed safety maintenance: if a qualified mechanic identifies unsafe brakes, tyres or other dangerous defects, stop using the car until it is made safe. A mileage dispute alone does not establish that the car is dangerous.
Before a test drive: do not drive a vehicle you believe is unsafe merely to gather evidence. An inspection can document the concern without exposing you to that risk.

Warning signs are a reason to investigate

A later mileage reading below an earlier one needs explaining. So does a seller's claim of little use when invoices suggest otherwise. Wear on pedals, seats and controls can raise questions, but cannot establish the true mileage by itself.

Ask for original evidence rather than accepting an undated screenshot or a verbal assurance. A digital display is not proof that the reading is trustworthy. Before buying, you can simply pause the purchase until the discrepancy is resolved; you do not need to establish who caused it to decide against proceeding.

Could it be an MOT recording error?

An incorrect MOT entry is different from a deliberately altered odometer. The official MOT-record correction page explains the appropriate route according to when the test took place. Follow its questions and evidence requirements; Northern Ireland has a separate process.

For mileage corrections requiring uploaded evidence, the service specifies contemporaneous documents such as a servicing receipt or inspection sheet. A dashboard photograph or MOT certificate is not accepted for that purpose. Ask the seller to obtain a documented correction rather than treating a promise to fix the record as proof.

What not to do

Treating a single unusual entry as conclusive evidence of deliberate fraud.
Accepting an unexplained change between miles and kilometres.
Letting the seller remove the advert before you have saved it.
Commissioning major work before discussing the dispute and preserving the evidence.
Reselling the vehicle while repeating a mileage claim you now know is doubtful.

After purchase: write a precise complaint

Keep the receipt, payment evidence, advert, messages and relevant history. Prepare a short chronology explaining what was represented before purchase and what you subsequently found. If you obtain an independent report, ask the engineer to distinguish observed facts from estimates.

Write to the seller identifying the discrepancy and the remedy you seek. Keep proof of sending and ask for a written response. Use the Citizens Advice used-car problem tool: answer its questions about the seller and description to explore possible remedies. Do not assume that every discrepancy automatically produces a full refund.

Trader, private seller and reporting

The Competition and Markets Authority examples specifically explain how false mileage and withholding genuine mileage can breach unfair-trading rules. Read the clocked-car example to understand the distinction between a misleading claim and missing important information.

A private-sale dispute follows a different route, although a false description can still matter. Obtain advice before choosing a legal claim. To report suspected unlawful trading, follow Citizens Advice's Trading Standards instructions and provide the seller's details and evidence. The consumer service passes reports on; enforcement reporting does not itself recover your money.

Good to know

A trader's warranty is separate from statutory rights. The Motor Ombudsman explanation of consumer rights describes how remedies and evidence requirements change over time; read it promptly after discovering a problem.
Ask what any disclaimer such as 'mileage not warranted' actually means. Keep the answer alongside the original advert.
This guide covers England. Advice and court procedures differ elsewhere in the UK; use the country-specific advice links on the Citizens Advice pages.

Illustrative example: Before buying a small car, Priya notices that an earlier MOT recorded a higher reading than the dashboard now shows. The seller says it was a typing mistake but cannot provide supporting records. She saves the advert and asks for documented clarification. She leaves the purchase on hold rather than accepting an unsupported explanation.

A made-up story, for illustration.

Bobby

Sources, verification, confidence

Verified on 6 November 2026, for England. Confidence: high for the official MOT-checking and correction routes, and the unfair-trading guidance on false mileage; medium for individual remedies, which depend on the seller, evidence and circumstances. No prevalence estimate or criminal penalty is asserted.