Ball joint dust cover severely deteriorated on the Mazda Mx-5
Ball joint dust cover severely deteriorated on the Mazda Mx-5 is recorded on 7,929 tests — 2.9% of all its MOT tests, against 1.3% across every car in the data. That is 2.2× the national share.
Is this unusual for this model?
| Compared with | What it says |
|---|---|
| Every car in the data | 1.3% of tests record it — this model is 2.2× that share |
| The 300 models compared | 49 of 300, highest first |
| The model's own record | 275,662 tests · every year of the Mx-5 → |
A share of tests is not a probability for your car: it counts every Mazda Mx-5 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, 4.9% of this model's tests recorded it; in 2015, 0.4%. The share has fallen 4.5 points over that time. Worst year 2002 at 6.5%; best 2015 at 0.4%.
| Year | Failures recorded | Tests | Share of tests |
|---|---|---|---|
| 2000 | 488 | 9,918 | 4.9% |
| 2001 | 348 | 6,997 | 5.0% |
| 2002 | 736 | 11,394 | 6.5% |
| 2003 | 851 | 14,788 | 5.8% |
| 2004 | 679 | 11,598 | 5.8% |
| 2005 | 673 | 11,840 | 5.7% |
| 2006 | 790 | 23,077 | 3.4% |
| 2007 | 889 | 27,476 | 3.2% |
| 2008 | 605 | 19,411 | 3.1% |
| 2009 | 455 | 14,915 | 3.0% |
| 2010 | 472 | 16,405 | 2.9% |
| 2011 | 309 | 11,791 | 2.6% |
| 2012 | 232 | 10,503 | 2.2% |
| 2013 | 205 | 10,357 | 2.0% |
| 2014 | 147 | 9,440 | 1.6% |
| 2015 | 42 | 9,600 | 0.4% |
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 £18–£45 fitted. It is a job a careful owner can do at home. 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
- Ball joint dust cover severely deteriorated: every model, every year → — the item's own page, with the part guide.
- Mazda Mx-5 MOT pass rate by year → — the model's whole record, and what else it fails on.
- Every Mazda model →