mechanics.tradeAnti-lock brakes
Testers wrote anti-lock brakes down 151,441 times during 2025, 40th on a list of 265 kinds of defect.
151,441recorded in 2025
0.5%of all recorded defects
40thon the national list
What it is
Where a car was built with ABS it has to work. The warning light must come on with the ignition and go out once the car is running, which shows the system has checked itself.
What the tester can write down
| Wording on the certificate | Category | Recorded in 2025 |
|---|---|---|
| Warning device shows system malfunction | Major | 143,274 |
What you can do about it
A light that stays on is very often one dirty wheel sensor rather than anything major. Reading the code first tells you which corner, which keeps the bill down.
Nearby on the list
Every defect on the list, from 42,728,066 MOT tests in 2025.