mechanics.tradeTyre pressure monitoring
Testers wrote tyre pressure monitoring down 159,924 times during 2025, 39th on a list of 265 kinds of defect.
159,924recorded in 2025
0.5%of all recorded defects
39thon the national list
What it is
Cars first used from January 2012 must have a working system. The dashboard warning has to light when you turn the key and then go out; a light that stays on is a fault.
What the tester can write down
| Wording on the certificate | Category | Recorded in 2025 |
|---|---|---|
| A tyre pressure monitoring system malfunctioning or obviously inoperative | Major | 159,924 |
What you can do about it
The sensors sit inside each wheel and carry batteries that eventually run flat, often around ten years old. Check your pressures first, since the system may simply be telling the truth.
Nearby on the list
Every defect on the list, from 42,728,066 MOT tests in 2025.