Blog / MOT advisories

MOT · 5 min read

What does an MOT advisory actually mean?

If your car's MOT came back as a pass with one or more advisories listed, it's easy to assume nothing's wrong. Technically, that's true: the car passed. But an advisory isn't the tester just being thorough for the sake of it. It's a specific note that something is wearing down and is worth your attention before it becomes a fail next year, or worse, a safety problem sooner than that.

Advisory versus fail: what's the actual difference

A tester fails a car when a component is already outside the legal limit or poses an immediate safety risk. An advisory is issued when something hasn't crossed that line yet, but is close enough that the tester thinks you should know about it. Tyres worn close to the legal tread limit, brake pads wearing thin, or a small exhaust leak are typical advisory-level notes. None of them fail the car today. All of them could fail it at the next test, or cause a breakdown before then.

Which advisories are worth acting on straight away

Not all advisories carry the same urgency. As a rough guide:

• Tyres and brakes are the two categories worth taking seriously immediately. Both affect how the car stops and handles, and both tend to move from advisory to fail faster than other items.
• Lights and bulbs flagged as advisory are usually cheap and quick to fix, so there's little reason to leave them.
• Corrosion, suspension wear, and exhaust mounts can often wait a few months, but are worth getting a garage to look at properly rather than ignoring for a full year.

Why advisory history matters when buying a used car

A single advisory on one test means little on its own. The same advisory appearing on two or three consecutive tests, getting slightly worse each time, tells a different story: a component that's been left to wear down rather than maintained. That pattern is exactly what a full MOT history check reveals, and it's one of the most useful things to look at before buying a used car, since it shows how it's actually been looked after rather than how it's been described to you.

What to do about it

For your own car, the simplest approach is to treat advisories as a to-do list rather than background noise. Get anything tyre or brake related looked at within a few weeks. Everything else can go on the list for your next routine service. For a car you're thinking of buying, pull the full test history and look at whether advisories repeat and worsen across tests, or whether they were addressed and disappeared by the following year.