by A mileage reading that drops between MOT tests needs an explanation. It might be a recording mistake or a replacement instrument cluster, but it could also mean the car has covered more miles than the seller says. Pause the purchase until the evidence makes sense.
Put the readings in date order
Start with the MOT history and note each test date and mileage. Add readings from dated service invoices and other paperwork. Look for a drop, a large unexplained jump or a service invoice that conflicts with a nearby MOT test.
A long gap does not prove that anything is wrong. Equally, a steadily rising MOT record cannot confirm every mile the car has travelled. Read our mileage check guide for the limits of the records.
Ask for evidence, not just an explanation
- A recording mistake: ask which entry is wrong and what dated evidence supports the correction.
- A replaced dashboard: ask for the invoice, replacement date and the readings before and after the work.
- A change in units: check whether documents use miles or kilometres before comparing the numbers.
- Missing paperwork: ask the seller whether the garage can supply duplicate invoices.
Check that the registration and vehicle details on every document match the car. A convincing story without supporting records still leaves you with uncertainty.
Compare the history with the car
Worn seats, pedals and steering wheels can prompt questions, but wear alone cannot establish mileage. Driving conditions, care and replacement parts all affect appearance. An independent inspection can help assess condition and likely maintenance needs.
Use our used-car buying checklist to check the documents, identity and condition together.
Decide whether to proceed
If the seller cannot explain the discrepancy with credible evidence, avoid paying a deposit while the issue remains unresolved. A lower price does not make an uncertain history easier to verify.
If you are selling the car, describe the uncertainty plainly and keep copies of the supporting paperwork. Do not advertise a mileage figure as verified when you cannot support it.
Check the rest of the history
Mileage is one part of the decision. Our car history guide explains the other records worth reviewing, while the vehicle check guide covers identity and paperwork.
Service update: registration lookup is currently paused. These guides explain what to review; they do not provide a live vehicle report.