Exhaust system insecure on the Citroen C1

Exhaust system insecure on the Citroen C1 is recorded on 17,422 tests — 3.0% of all its MOT tests, against 1.1% across every car in the data. That is 2.7× 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 2.7× that share
The 257 models compared	43 of 257, highest first
The model's own record	585,817 tests · every year of the C1 →

A share of tests is not a probability for your car: it counts every Citroen C1 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, 1.2% of this model's tests recorded it; in 2018, 0.4%. The share has fallen 0.7 points over that time. Worst year 2006 at 1.4%; best 2018 at 0.4%.

Year	Failures recorded	Tests	Share of tests
2005	96	8,166	1.2%
2006	741	53,355	1.4%
2007	1,006	83,604	1.2%
2008	1,277	116,664	1.1%
2009	1,836	134,904	1.4%
2010	1,734	144,690	1.2%
2011	1,886	151,920	1.2%
2012	1,758	149,088	1.2%
2013	1,581	148,254	1.1%
2014	746	140,412	0.5%
2015	974	183,045	0.5%
2016	2,465	184,362	1.3%
2017	1,015	90,399	1.1%
2018	304	68,466	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 £45–£120 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

Exhaust system insecure: every model, every year → — the item's own page, with the part guide.
Citroen C1 MOT pass rate by year → — the model's whole record, and what else it fails on.
Every Citroen model →