How to read an MOT history
A free MOT history check is a starting point, not a mechanical inspection. Here is how to read the results without missing the important details.
Updated 20 October 2026 · UK used-car guidance
What an MOT test actually tells you
An MOT checks whether a vehicle meets specified minimum road safety and environmental standards at the time of the test. It is not a service, a warranty or a comprehensive assessment of its mechanical condition. A vehicle can pass and still need expensive maintenance.
Passes, failures and defect categories
A pass means the vehicle met the test standard on that date. A fail means it did not. Defects can be recorded as dangerous, major or minor, and testers may record advisories for things that could need attention later. Treat dangerous defects seriously and do not assume a car is safe simply because a later pass appears.
Why repeated advisories matter
If tyres, corrosion, suspension or brakes appear on several MOT dates, ask what was inspected and repaired. A repeated category does not necessarily mean the same component has failed repeatedly. Compare the exact descriptions and dates.
Does a later pass prove a repair?
Not necessarily. A later pass is useful evidence that the car met the MOT standard at that later test, but it does not confirm which repair was made or the quality of the work. Ask for invoices, service records and a fresh independent inspection if anything concerns you.
Check the date and recorded mileage
Look at the newest test, its result and the recorded mileage. Check whether a later pass followed a failure. Mileage entries can contain mistakes, so investigate unexpected decreases rather than assuming fraud.
Buyer tip: Use CarMOTX's automated findings as questions for the seller. For an independent source, see the official GOV.UK MOT history service.