Recorded in
1.1% 35% fail
of every MOT test in our data — 1,251,313 records across 933 models.
Suspension → Component mounting: prescribed area excessively corroded
The Component mounting: prescribed area excessively corroded MOT failure is recorded in 1.1% of all MOT tests in the DVSA data — 1,251,313 records across 933 models. A typical repair costs £180–£450. This page explains what the item means, how testers write it down, what a repair usually involves and Toyota Hiace records it most often for its size.
Advisory only
65%
were noted without failing the car.
Typical cost
£180–£450
Usually a garage job. Estimate, fitted where needed.
What Component mounting: prescribed area excessively corroded means on an MOT
Component mounting: prescribed area excessively corroded is an MOT inspection item in the suspension section of the manual. The tester records it when they see the condition the description names — here, when component mounting: prescribed area excessively corroded. Corrosion is judged on how much strength the affected part has left — surface rust alone does not fail, a weakened or holed part does. The failure is reported against that rule, so the page uses the tester's own wording.
How common is Component mounting: prescribed area excessively corroded on an MOT?
Recorded in 1.1% of every MOT test in our data — 1,251,313 records across 933 models. That is 1% in every hundred tests, which puts Component mounting: prescribed area excessively corroded in the middle of the items testers record.
Of the 1,251,313 records for this item, 35.4% of the records are a fail (Major or Dangerous) and 64.6% are advisories that did not fail the car.
Other things testers write about this item
Testers do not all write the same thing. These are the exact DVSA strings from the records for this item, each with how many tests it was written on — the page's keyword vocabulary comes straight from them.
- Rigid brake pipes excessively corroded — 5,078,147 records
- Coil spring corroded so that its cross sectional area is reduced and seriously weakened — 4,052,861 records
- Flexible brake hoses ferrule excessively corroded — 1,090,431 records
- Integral vehicle structure condition corroded to the extent that the rigidity of the assembly is significantly reduced — 612,323 records
- Chassis condition corroded to the extent that the rigidity of the assembly is significantly reduced — 510,995 records
- Sub-frame mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength — 366,545 records
- Other suspension component corroded and seriously weakened — 357,489 records
- Chassis condition or chassis has excessive corrosion, seriously affecting its strength within 30cm of a body mounting — 282,617 records
- Prescribed areas prescribed area strength or continuity significantly reduced — 276,712 records
- Non-component advisories Fuel Pipe/s corroded — 242,099 records
What does it cost to fix Component mounting: prescribed area excessively corroded?
A typical repair on this item costs £180–£450 at UK prices, and it is usually a garage job. The bracket is our estimate from reported prices and parts, rather than a DVSA figure — see how it is built on the method page.
How the price brackets are built · full repair cost list · add it to your fail-sheet total.
Models that record Component mounting: prescribed area excessively corroded most often
As a rate of each model's own tests, Toyota Hiace and Mazda Bongo lead the list: Toyota Hiace records it on 13.7% of its tests. The rate, not the volume, is what matters here — a model with 20,000 tests can outrank one with a million.
| # | Model | Rate | Tests | Detail |
|---|---|---|---|---|
| 1 | Toyota Hiace | 13.7% | 23,078 | — |
| 2 | Mazda Bongo | 13.6% | 30,855 | 12.4× · year by year → |
| 3 | Honda Fr-V | 12.4% | 27,466 | — |
| 4 | Rover 75 | 11.9% | 28,888 | — |
| 5 | Toyota Celica | 11.0% | 27,501 | — |
| 6 | Toyota Hi-Ace | 9.9% | 24,156 | 9.0× · year by year → |
| 7 | Jaguar X-Type | 9.4% | 93,223 | — |
| 8 | Citroen C2 | 8.5% | 43,091 | — |
| 9 | Fiat Scudo | 8.4% | 32,202 | 7.6× · year by year → |
| 10 | Nissan Almera | 8.3% | 54,229 | — |
| 11 | Lexus IS200 | 8.2% | 20,777 | — |
| 12 | Suzuki Grand Vitara | 7.1% | 77,753 | 6.5× · year by year → |
| 13 | Mitsubishi Shogun | 6.7% | 105,518 | 6.1× · year by year → |
| 14 | Daihatsu Sirion | 6.5% | 22,729 | — |
| 15 | Suzuki Wagon-R+ | 6.2% | 29,904 | — |
| 16 | Hyundai Amica | 6.1% | 22,089 | — |
| 17 | Chevrolet Matiz | 5.9% | 40,193 | — |
| 18 | Subaru Impreza | 5.8% | 54,707 | 5.3× · year by year → |
| 19 | Toyota Rav-4 | 5.7% | 109,644 | 5.2× · year by year → |
| 20 | Mitsubishi Colt | 5.4% | 86,319 | 4.9× · year by year → |
Which years of car record Component mounting: prescribed area excessively corroded
| Year | Recorded in |
|---|---|
| 2010 | 1.5% |
| 2011 | 1.0% |
| 2012 | 0.6% |
| 2013 | 0.4% |
| 2014 | 0.2% |
| 2015 | 0.1% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2018 | 0.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2021 | 0.0% |
| 2022 | 0.0% |
These are rates by year of registration from 2010 to 2022, not year of test, so the curve mostly reflects age — a recent car has barely been to a test station. Compare models at the same age instead.
Frequently asked questions about Component mounting: prescribed area excessively corroded
How common is Component mounting: prescribed area excessively corroded on an MOT?
It is recorded in 1.1% of all MOT tests — 1,251,313 records across 933 models.
Does Component mounting: prescribed area excessively corroded fail the MOT or just get an advisory?
35.4% of the records for it are a fail, 0.0% were fixed at the test, 0.0% are minor and 64.6% are advisories. In short, it is an advisory or minor most of the time rather than a fail.
Which cars record Component mounting: prescribed area excessively corroded most often?
Toyota Hiace and Mazda Bongo head the list, at a rate of each model's own tests — Toyota Hiace records it on 13.7%. Only models with at least 20,000 recorded tests are shown.
How much does it cost to fix Component mounting: prescribed area excessively corroded?
Typically £180–£450 fitted, and it is usually a garage job. That is an estimate from reported prices, not a DVSA figure.
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