Citroen Ë-C4: lighting & signalling MOT failures
Lighting & signalling was recorded as a failure area in 14.2% of Citroen Ë-C4 MOT tests — 130,874 tests out of 920,349. It shows up most on 2004 and 2010 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 |
|---|---|---|
| 2004 | 394 | 27.4% |
| 2005 | 9,949 | 21.8% |
| 2006 | 18,098 | 22.9% |
| 2007 | 54,092 | 22.4% |
| 2008 | 66,971 | 23.0% |
| 2009 | 43,672 | 22.4% |
| 2010 | 47,623 | 23.5% |
| 2011 | 50,548 | 14.9% |
| 2012 | 58,077 | 15.2% |
| 2013 | 82,480 | 14.4% |
| 2014 | 135,519 | 10.9% |
| 2015 | 174,882 | 11.0% |
| 2016 | 108,178 | 9.4% |
| 2017 | 5,905 | 7.6% |
| 2018 | 15,929 | 6.5% |
| 2019 | 23,905 | 6.0% |
| 2020 | 5,986 | 3.9% |
| 2021 | 11,693 | 2.1% |
| 2022 | 6,137 | 2.8% |
| 2023 | 264 | 2.6% |
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.