Mazda 6: lighting & signalling MOT failures
Lighting & signalling was recorded as a failure area in 8.8% of Mazda 6 MOT tests — 35,470 tests out of 402,150. It shows up most on 2003 and 2008 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 |
|---|---|---|
| 2002 | 734 | 17.0% |
| 2003 | 1,942 | 18.2% |
| 2004 | 3,660 | 16.9% |
| 2005 | 7,689 | 17.4% |
| 2006 | 11,778 | 15.9% |
| 2007 | 20,110 | 17.4% |
| 2008 | 27,379 | 20.4% |
| 2009 | 29,487 | 14.3% |
| 2010 | 36,956 | 13.4% |
| 2011 | 28,204 | 13.4% |
| 2012 | 19,176 | 11.3% |
| 2013 | 26,665 | 4.6% |
| 2014 | 38,679 | 4.2% |
| 2015 | 40,129 | 3.6% |
| 2016 | 40,574 | 3.0% |
| 2017 | 26,873 | 2.4% |
| 2018 | 18,016 | 2.0% |
| 2019 | 19,529 | 1.6% |
| 2020 | 3,381 | 1.6% |
| 2021 | 729 | 2.1% |
| 2022 | 448 | 2.0% |
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.