Mazda 6: lighting & signalling MOT failures
Lighting & signalling was a recorded failure area in 8.8% of Mazda 6 MOT tests in this dataset. It is most prominent on 2005, 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 |
|---|---|---|
| 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% |
| 2016 | 40,574 | 3.0% |
| 2017 | 26,873 | 2.4% |
| 2018 | 18,016 | 2.0% |
Methodology & source. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.