Registration plate lamp inoperative (single lamp) on the Citroen C4
Registration plate lamp inoperative (single lamp) on the Citroen C4 is recorded on 14,004 tests — 2.8% of all its MOT tests, against 0.9% across every car in the data. That is 3.1× the national share.
Is this unusual for this model?
| Compared with | What it says |
|---|---|
| Every car in the data | 0.9% of tests record it — this model is 3.1× that share |
| The 277 models compared | 18 of 277, highest first |
| The model's own record | 504,935 tests · every year of the C4 → |
A share of tests is not a probability for your car: it counts every Citroen C4 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, 0.8% of this model's tests recorded it; in 2019, 0.5%. The share has fallen 0.3 points over that time. Worst year 2010 at 1.8%; best 2019 at 0.5%.
| Year | Failures recorded | Tests | Share of tests |
|---|---|---|---|
| 2005 | 62 | 7,562 | 0.8% |
| 2006 | 106 | 14,954 | 0.7% |
| 2007 | 490 | 45,548 | 1.1% |
| 2008 | 777 | 58,922 | 1.3% |
| 2009 | 585 | 41,484 | 1.4% |
| 2010 | 873 | 49,162 | 1.8% |
| 2011 | 709 | 55,350 | 1.3% |
| 2012 | 901 | 65,826 | 1.4% |
| 2013 | 1,444 | 96,256 | 1.5% |
| 2014 | 2,738 | 161,602 | 1.7% |
| 2015 | 3,263 | 209,174 | 1.6% |
| 2016 | 1,702 | 129,180 | 1.3% |
| 2017 | 65 | 6,818 | 0.9% |
| 2018 | 118 | 18,922 | 0.6% |
| 2019 | 161 | 32,240 | 0.5% |
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 £5–£20 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
- Registration plate lamp inoperative (single lamp): every model, every year → — the item's own page, with the part guide.
- Citroen C4 MOT pass rate by year → — the model's whole record, and what else it fails on.
- Every Citroen model →