Component mounting: prescribed area excessively corroded on the Toyota Corolla
Component mounting: prescribed area excessively corroded on the Toyota Corolla is recorded on 14,169 tests — 3.9% of all its MOT tests, against 1.1% across every car in the data. That is 3.5× the national share.
Is this unusual for this model?
| Compared with | What it says |
|---|---|
| Every car in the data | 1.1% of tests record it — this model is 3.5× that share |
| The 236 models compared | 39 of 236, highest first |
| The model's own record | 366,022 tests · every year of the Corolla → |
A share of tests is not a probability for your car: it counts every Toyota Corolla tested, whatever its mileage, service history and use. The like-for-like comparison on the model page is the fairer number.
Year by year
In 2000, 2.8% of this model's tests recorded it; in 2009, 1.6%. The share has fallen 1.2 points over that time. Worst year 2004 at 5.0%; best 2009 at 1.6%.
| Year | Failures recorded | Tests | Share of tests |
|---|---|---|---|
| 2000 | 355 | 12,822 | 2.8% |
| 2001 | 644 | 14,998 | 4.3% |
| 2002 | 1,016 | 27,680 | 3.7% |
| 2003 | 1,935 | 63,246 | 3.1% |
| 2004 | 2,817 | 56,220 | 5.0% |
| 2005 | 3,286 | 85,066 | 3.9% |
| 2006 | 2,632 | 93,794 | 2.8% |
| 2007 | 893 | 50,895 | 1.8% |
| 2008 | 431 | 24,302 | 1.8% |
| 2009 | 150 | 9,416 | 1.6% |
Years with fewer than 0.2% of tests recording the item are left out: a year with two failures in 400 tests is noise, and this table is not here to make noise look like a trend.
What it costs
A typical UK repair for this item is £180–£450 fitted. It is a job for a garage, not a driveway. What the part is, and what to buy →
Prices are typical UK supply-and-fitting estimates, not quotes. What happens if it fails covers the retest rules.
Where this sits
- Component mounting: prescribed area excessively corroded: every model, every year → — the item's own page, with the part guide.
- Toyota Corolla MOT pass rate by year → — the model's whole record, and what else it fails on.
- Every Toyota model →