CV boot severely deteriorated on the Audi Tt

CV boot severely deteriorated on the Audi Tt is recorded on 12,117 tests — 3.1% of all its MOT tests, against 1.5% across every car in the data. That is 2.1× the national share.

Is this unusual for this model?

Compared with	What it says
Every car in the data	1.5% of tests record it — this model is 2.1× that share
The 304 models compared	59 of 304, highest first
The model's own record	393,689 tests · every year of the Tt →

A share of tests is not a probability for your car: it counts every Audi Tt 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, 8.6% of this model's tests recorded it; in 2013, 0.3%. The share has fallen 8.2 points over that time. Worst year 2001 at 10.4%; best 2013 at 0.3%.

Year	Failures recorded	Tests	Share of tests
2000	555	6,491	8.6%
2001	1,068	10,285	10.4%
2002	1,424	15,550	9.2%
2003	1,215	17,736	6.8%
2004	1,351	17,430	7.8%
2005	1,092	13,620	8.0%
2006	907	10,955	8.3%
2007	1,938	29,019	6.7%
2008	1,878	26,151	7.2%
2009	267	21,418	1.3%
2010	110	23,046	0.5%
2011	96	22,420	0.4%
2012	85	18,898	0.5%
2013	68	21,019	0.3%

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–£250 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

CV boot severely deteriorated: every model, every year → — the item's own page, with the part guide.
Audi Tt MOT pass rate by year → — the model's whole record, and what else it fails on.
Every Audi model →