mechanics.tradeCorrosion near the suspension
Testers wrote corrosion near the suspension down 293,215 times during 2025, 30th on a list of 265 kinds of defect.
293,215recorded in 2025
1.0%of all recorded defects
30thon the national list
What it is
The structure within 30cm of a suspension or subframe mounting has to be sound, because that is where the load goes into the body. Corrosion that weakens it is recorded as a major fault.
What the tester can write down
| Wording on the certificate | Category | Recorded in 2025 |
|---|---|---|
| The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired | Major | 268,610 |
What you can do about it
This one is harder to judge from outside, and it is a proper welding repair rather than a part swap. Ask to be shown the area: testers can usually point it out with the car on the lift.
Advisories
Testers also noted this 497,458 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.