MOT failure · RFR #40542
A main load-bearing structural member corroded to the extent that the rigidity of the assembly is seriously reduced
Total
15
Models
2
Models most at risk.
Ranked by rate, not raw volume. A Fiesta shows every failure a lot because there are a lot of Fiestas. Rate = share of that model's own MOTs.
Cost orientation
Hard to predict in isolation — depends what's actually worn.
This defect doesn't map to a clean retail-part swap; ranges vary too widely without seeing the car. Use the estimator to bracket the all-in cost across the items most likely to surface alongside it.
Open estimator
Frequently asked.
- Why does a main load-bearing structural member corroded… fail an MOT?
- A main load-bearing structural member corroded to the extent that the rigidity of the assembly is seriously reduced. Most commonly flagged on the Honda C90. The DVSA's MOT standards require this item to meet minimum safety thresholds — when it falls short, the tester logs it as a Major or Dangerous defect and the car fails outright.
- How much does it cost to fix a main load-bearing structural member corroded…?
- Costs vary depending on the vehicle, region, and severity. Use our MOT cost estimator for typical UK garage rates across the most common failure items.