A brake pads wearing thin advisory means the pads are not yet at the wear indicator. Pads worn to the wear indicator are a major defect, and pads below 1.5mm are dangerous. A lit brake wear warning light on its own is not a fail.
Checked 23 October 2026 against the DVSA MOT inspection manual
- At wear indicator: Major defect
- Below 1.5mm: Dangerous defect
- Warning light only: Not a fail
- DVSA manual: 1.1.13
What this advisory means
An advisory records an item that is not serious enough to fail the test, so the presenter is informed of it. It does not cause a fail and it is stored in the vehicle's MOT history. In this case the note means the brake pads are wearing thin but have not yet reached the point at which the DVSA manual requires a fail. The tester has judged the remaining friction material to be above the relevant thresholds, so the item is reported rather than rejected.
Pad wear is judged against the DVSA manual. A pad or lining worn down to the wear indicator is a major defect under 1.1.13 a i, and worn below 1.5mm is a dangerous defect under 1.1.13 a ii. A pad contaminated with oil or grease is also a major defect. An illuminated brake wear warning light on the dashboard is not itself a reason to fail, so its presence alone does not decide the outcome.
The advisory therefore sits below the major defect threshold: the pads are thin but not at the wear indicator and not below 1.5mm. It gives the presenter a record of the measured condition at the time of test. Because the note is held in the MOT history, the wear can be compared at later tests. The wording reflects the tester's judgement of the friction material against the manual, not the warning light.
When it becomes an MOT fail
A brake pad or lining worn down to the wear indicator becomes a major defect under DVSA manual reference 1.1.13 a i. At this point the advisory recorded for thin pads is replaced by a fail, and the vehicle cannot pass its MOT until the fault is rectified.
Where a brake pad or lining is worn below 1.5mm, the defect is classified as dangerous under reference 1.1.13 a ii. A pad contaminated with oil or grease is also a major defect.
An illuminated brake wear warning light on the dashboard is not itself a reason to fail the MOT. The light may indicate that a pad has reached its wear indicator, but the defect decision rests on the physical condition of the pad or lining as assessed against the manual. The relevant references are 1.1.13 a i for wear to the indicator and 1.1.13 a ii for wear below 1.5mm.
| DVSA manual ref | Defect | Result |
|---|---|---|
| 1.1.13 (a)(i) | Pad worn down to wear indicator | Major |
| 1.1.13 (a)(ii) | Pad worn below 1.5mm | Dangerous |
| 1.1.13 (b) | Pad contaminated with oil, grease etc. | Major |
Source: DVSA manual section 1: brakes, checked 23 October 2026.
Frequently asked questions
What does an MOT advisory for brake pads wearing thin mean?
An advisory is used when an item is not deteriorated enough to justify a fail, to inform the presenter. Advisories do not cause a fail and are recorded in the MOT history. It notes that the brake pads are wearing thin so the condition is on record.
At what brake pad thickness is a major defect recorded?
A brake pad or lining worn down to the wear indicator is a major defect under DVSA manual 1.1.13 a i. A major defect causes an MOT fail.
What happens if brake pads are worn below 1.5mm?
A brake pad worn below 1.5mm is a dangerous defect under DVSA manual 1.1.13 a ii. A dangerous defect causes an MOT fail and the vehicle must not be driven on the road until the fault is rectified.
Does an illuminated brake wear warning light cause an MOT fail?
An illuminated brake wear warning light on the dashboard is not itself a reason to fail. The light alone does not decide the result. The actual condition of the brake pads is assessed against the DVSA manual criteria.
Is a brake pad contaminated with oil or grease a fail?
A brake pad contaminated with oil or grease is a major defect. A major defect causes an MOT fail.
