MOT advisories explained

After you run an MOT history check, defect wording can look technical. This guide translates the main categories into practical buyer language.

Advisory

An advisory highlights something that may need attention in future. The car can still pass. Repeated advisories on the same area - tyres, corrosion, oil leaks - are a signal to inspect carefully and budget for work.

Minor

Minor defects are not severe enough to fail the test under current rules, but they are recorded. Ask whether they have been fixed since the test.

Major

Major defects cause an MOT failure. The vehicle should not be driven on public roads until repaired and retested, except to a pre-arranged repair appointment in limited circumstances. For buyers, a recent major fail deserves a clear explanation and evidence of repair.

Dangerous

Dangerous defects are the most serious failure category. Do not treat these lightly. Confirm repairs with invoices and a fresh pass before purchase.

Repeated advisories

One advisory may be routine. The same advisory appearing year after year can mean deferred maintenance. Factor likely repair costs into the price.

What a buyer should do

• Read the latest test first, then scan older failures.
• Ask the seller what was repaired after any fail.
• Budget for outstanding advisories that look imminent.
• Combine MOT history with a careful inspection - an MOT is not a full mechanical survey.