MOT & ROADWORTHINESS · LAST REVIEWED: JUNE 2026
TL;DR: A brake pads wearing thin advisory means the tester judged the friction material to be getting low but still serviceable, so the car passed. Pads are a wearing part, and the note is a prompt to plan replacement before the material runs out and braking is affected.
A brake pads wearing thin advisory is one of the most common notes a tester records, because brake pads are designed to wear away over time. As an advisory it means the pads still have usable friction material, so the vehicle passed, but the margin is narrowing.
Pads press against the brake disc every time the car slows, and the friction material is slowly consumed. The advisory is the MOT system flagging that the pads are heading towards the point where they will need changing, without that point having been reached yet.
KEY FACTS
- An advisory is not a failure: the vehicle passes, but DVSA records the item as worth monitoring before the next test.
- Brakes are assessed under the DVSA MOT inspection manual, which separates advisory, major and dangerous brake defects.
- Pads worn down to the backing, or brakes that do not meet the required efficiency, are recorded as major or dangerous defects rather than advisories.
- The current defect grades of dangerous, major, minor and advisory were introduced in May 2018.
- Driving without a valid MOT can bring a fine of up to £1,000 under the Road Traffic Act 1988.
What the brake pad advisory means
Brake pads consist of a steel backing plate and a layer of friction material that grips the disc. With every brake application a small amount of that material is worn away. When a tester writes that the pads are wearing thin, they have measured or judged the remaining material to be low but still within the serviceable range.
Because pads wear gradually, a wearing thin advisory at one test often becomes a replacement job before the next. The note does not mean the brakes are unsafe now, but it does mean the pads are closer to the end of their life than to the start.
When thin pads become a failure
Thin pads cross into a major or dangerous defect when the friction material is worn down to or near the backing plate, when a pad is missing or insecure, or when the overall braking efficiency measured on the test fails to meet the required standard. At that point the tester records a fail rather than an advisory.
Letting pads wear to the metal can also damage the disc, turning a routine pad change into a larger repair. The advisory is the system flagging the cheaper, earlier point at which the pads could be renewed before that happens.
Why testers record it and what to do
Testers log advisories so owners have a documented record of components that are wearing but not yet failing. This flags a predictable cost in advance and supports safety by encouraging maintenance before a part becomes a hazard. The note also appears on the online MOT history.
Brake pads are replaced rather than repaired, and they are usually renewed in axle pairs so braking stays balanced. Where pads are changed, the discs are often inspected at the same time. Any brake work should be done by a competent mechanic and the brakes tested before normal use.
Signs to watch between tests
An advisory at the MOT is one signal that pads are wearing, but the car gives others between tests. A high pitched squeal when braking often comes from a wear indicator, a small metal tab designed to contact the disc and make a noise as the pad gets low. A grinding sound is more serious and can mean the friction material has gone and metal is contacting the disc.
A change in how the brakes feel is also worth noticing. A pedal that travels further, a car that takes longer to stop, or a pulsing through the pedal can all point to brake wear or a related fault. None of these should be left, because braking is a safety system and the cost of acting early is usually lower than the cost of waiting.
How quickly pads wear depends heavily on use. Stop start town driving, towing, carrying heavy loads and hilly routes all wear pads faster than steady motorway miles. Two cars of the same age can be in very different states, which is why an advisory is read alongside how and where the car is driven.
If pads are approaching the end of their life, planning the replacement before the next test avoids a fail and the cost of a retest. Renewing pads in axle pairs and inspecting the discs at the same time keeps braking balanced and prevents a small job becoming a larger one.
It also helps to read the advisory in context. Front pads usually wear faster than rear pads because the front brakes do most of the work, so an advisory on the front axle is common and does not by itself suggest neglect. Comparing the note against the recorded mileage and the pattern in the MOT history gives a sense of how quickly the pads are wearing, which makes it easier to judge whether replacement is needed soon or can wait until closer to the next test. A garage can also measure the remaining material more precisely during a service, turning the tester's visual judgement into a clearer figure that helps decide the timing of the work.
Pad wear is also one of the cheapest advisories to act on early. Replacing pads before they reach the metal backing protects the discs, and a disc replacement typically costs several times more than the pads alone.
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DISCLAIMER: This guide is general information, not professional advice. MOT rules and fees are set by the DVSA and can change. Check gov.uk for current requirements before acting.
Frequently Asked Questions
What does a brake pads wearing thin advisory mean?
It means the tester judged the friction material on the pads to be low but still serviceable, so the car passed. DVSA has flagged the pads as a part to monitor and likely replace before the material runs out.
Is a brake pad advisory an MOT failure?
No. An advisory is recorded on a vehicle that has passed. The brakes become a fail when the pads are worn to the backing, a pad is missing or insecure, or the measured braking efficiency does not meet the required standard.
How long can I drive with thin brake pads?
The MOT remains valid for its full term, so there is no legal cut-off tied to the advisory. Pads continue to wear with use, so they should be checked before the next test and replaced if symptoms such as noise or reduced braking appear.
Will thin pads damage my brake discs?
If pads are left until the friction material is gone, the backing plate can score or damage the disc, which adds to the repair. Replacing pads while there is still material left avoids that risk, which is part of why the advisory is recorded.
