Rigid brake pipes excessively corroded on the Mercedes-Benz B-Class
Rigid brake pipes excessively corroded on the Mercedes-Benz B-Class is recorded on 24,691 tests — 10.7% of all its MOT tests, against 4.6% across every car in the data. That is 2.3× 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 2.3× that share |
| The 318 models compared | 70 of 318, highest first |
| The model's own record | 230,643 tests · every year of the B-Class → |
A share of tests is not a probability for your car: it counts every Mercedes-Benz B-Class 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 2005, 11.8% of this model's tests recorded it; in 2018, 0.4%. The share has fallen 11.4 points over that time. Worst year 2006 at 12.6%; best 2017 at 0.3%.
| Year | Failures recorded | Tests | Share of tests |
|---|---|---|---|
| 2005 | 389 | 3,300 | 11.8% |
| 2006 | 2,001 | 15,878 | 12.6% |
| 2007 | 2,529 | 31,491 | 8.0% |
| 2008 | 3,834 | 41,562 | 9.2% |
| 2009 | 4,559 | 51,042 | 8.9% |
| 2010 | 4,083 | 35,512 | 11.5% |
| 2011 | 2,999 | 41,670 | 7.2% |
| 2012 | 2,679 | 63,552 | 4.2% |
| 2013 | 411 | 76,626 | 0.5% |
| 2014 | 513 | 59,176 | 0.9% |
| 2015 | 287 | 39,250 | 0.7% |
| 2016 | 219 | 36,588 | 0.6% |
| 2017 | 132 | 38,388 | 0.3% |
| 2018 | 52 | 12,760 | 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 £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.
- Mercedes-Benz B-Class MOT pass rate by year → — the model's whole record, and what else it fails on.
- Every Mercedes-Benz model →