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Mileage questions to ask before buying a used car

Asking whether mileage is 'genuine' often produces a yes-or-no answer without useful evidence. Better questions connect the advertised figure to the dashboard, dated records and any break in the history. Prepare them before a viewing so you can focus on the vehicle rather than improvising under pressure. This is an evidence-gathering checklist, not legal advice, a condition assessment or a guarantee that a car is suitable to buy.

Ask what the advertised number represents

Is the advertised figure the current odometer reading, an older observation or an adjusted figure following instrument work? Ask when it was recorded and whether the vehicle has been driven since. Request the unit explicitly. If the advertisement rounds the figure, ask for the actual display rather than treating a small difference as suspicious or ignoring a substantial unexplained one.

At the viewing, ask the seller to identify the total-distance screen while the car is stationary. Do not confuse a trip counter, range prediction or service interval with the odometer. Check whether the displayed unit matches the advertisement. If you cannot establish which screen you are seeing, record that uncertainty rather than entering a confident-looking number into a calculator.

Ask for the records that support the story

Review the official MOT history yourself rather than relying entirely on a screenshot selected by the seller. GOV.UK provides recorded test mileages and results, within its stated coverage. It is not a full service history or continuous distance log. Ask what service invoices, inspection sheets or other dated records are available to bridge important gaps.

Check that paperwork relates to this vehicle and that its event dates, units and readings are understandable. If records are unavailable, ask which periods are unsupported. Missing paperwork does not prove wrongdoing, but it limits what you can confirm. A promise that documentation will appear later is not the same as reviewing it before making your decision.

  • Which date and source support the advertised reading?
  • Are any entries in kilometres rather than miles?
  • Which intervals have no supporting records?
  • Can I review the original documents rather than only a summary?

Ask precise questions about anomalies

Use a timeline to identify the actual conflicting entries. Ask why a later reading is lower after the units have been confirmed, or why the dates appear out of sequence. Request evidence for a proposed explanation, including instrument-replacement paperwork where relevant. Keep the seller's statement distinct from what the documents establish, and avoid accusations based solely on an automated flag.

If the seller says an MOT entry is incorrect, ask whether a correction has been requested and whether the official history has changed. Follow the current GOV.UK route to understand what evidence is required; Northern Ireland has a separate DVA route. A manually edited worksheet cannot amend the official record. Save the unresolved issue rather than removing a troublesome row to make the output look clean.

Ask what an independent inspection can actually tell you

Choose an inspector independently and agree the scope before paying. Ask whether they can examine the specific concern and what their conclusions would not establish. Mechanical condition and recorded mileage are related considerations, but neither can be reduced to a single dashboard figure. Visible wear may justify questions; it is not a reliable odometer or a standalone fraud verdict.

Leave room to pause if the explanation or documentation is incomplete. Our local worksheet can organise your questions and export a TXT summary, but it has no live vehicle-data access and cannot authenticate documents, verify a seller or certify lifetime distance. An increasing sequence means only that those entered observations do not decrease. It is not a reason to disregard other concerns or proceed before you are comfortable with the evidence.

Sources and further reading

Editorial review: 6 November 2026. This guide is general preparation information, not a technical assessment or confirmed service offer.