Citroen C1: lighting & signalling MOT failures
Of the 1,005,242 Citroen C1 MOT tests in this dataset, 10.5% recorded at least one lighting & signalling failure. It shows up most on 2005 and 2006 cars.
Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair cost: £10–£150 (rough UK ballpark, not a quote).
Lighting & signalling failures by year
| Model year | Tests | Fail rate |
|---|---|---|
| 2005 | 5,254 | 24.5% |
| 2006 | 34,406 | 21.3% |
| 2007 | 52,476 | 16.8% |
| 2008 | 71,133 | 16.4% |
| 2009 | 79,445 | 15.0% |
| 2010 | 83,478 | 13.6% |
| 2011 | 86,897 | 14.9% |
| 2012 | 84,770 | 13.0% |
| 2013 | 84,239 | 11.9% |
| 2014 | 79,875 | 6.9% |
| 2015 | 104,089 | 4.8% |
| 2016 | 103,921 | 4.8% |
| 2017 | 51,031 | 3.6% |
| 2018 | 39,210 | 2.5% |
| 2019 | 22,823 | 2.3% |
| 2020 | 12,255 | 1.7% |
| 2021 | 9,522 | 1.6% |
| 2022 | 415 | 2.2% |
Methodology & source. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.