Rigid brake pipes excessively corroded on the BMW 525
Rigid brake pipes excessively corroded on the BMW 525 is recorded on 4,321 tests — 9.3% of all its MOT tests, against 4.6% across every car in the data. That is 2.0× the national share.
Is this unusual for this model?
| Compared with | What it says |
|---|---|
| Every car in the data | 4.6% of tests record it — this model is 2.0× that share |
| The 318 models compared | 87 of 318, highest first |
| The model's own record | 46,357 tests · every year of the 525 → |
A share of tests is not a probability for your car: it counts every BMW 525 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 2001, 10.1% of this model's tests recorded it; in 2011, 0.7%. The share has fallen 9.5 points over that time. Worst year 2004 at 10.6%; best 2010 at 0.5%.
| Year | Failures recorded | Tests | Share of tests |
|---|---|---|---|
| 2001 | 386 | 3,810 | 10.1% |
| 2002 | 515 | 4,998 | 10.3% |
| 2003 | 491 | 4,792 | 10.3% |
| 2004 | 770 | 7,274 | 10.6% |
| 2005 | 926 | 10,334 | 9.0% |
| 2006 | 763 | 13,989 | 5.5% |
| 2007 | 161 | 11,272 | 1.4% |
| 2008 | 80 | 10,158 | 0.8% |
| 2009 | 67 | 7,608 | 0.9% |
| 2010 | 33 | 6,170 | 0.5% |
| 2011 | 17 | 2,616 | 0.7% |
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 £80–£180 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
- Rigid brake pipes excessively corroded: every model, every year → — the item's own page, with the part guide.
- BMW 525 MOT pass rate by year → — the model's whole record, and what else it fails on.
- Every BMW model →