mechanics.tradeBrake efficiency
Testers wrote brake efficiency down 544,975 times during 2025, 19th on a list of 265 kinds of defect.
544,975recorded in 2025
1.8%of all recorded defects
19thon the national list
What it is
Your footbrake is measured on rollers and has to reach a set percentage of the car's weight. This is a measured figure rather than a judgement, so there is no argument about the result.
What the tester can write down
| Wording on the certificate | Category | Recorded in 2025 |
|---|---|---|
| Significant brake effort recorded with no brake applied indicating a binding brake | Major | 226,071 |
| Excessive fluctuation in brake effort through each wheel revolution. | Major | 115,244 |
What you can do about it
Low efficiency usually traces back to worn pads, glazed discs or a sticking caliper. It is worth knowing the actual figure, so ask for the printout rather than just the pass or fail.
Advisories
Testers also noted this 951,547 times in 2025 as an advisory, without failing the car for it. That is worth acting on before the next test comes round.
Nearby on the list
Every defect on the list, from 42,728,066 MOT tests in 2025.