Mazda 3: lighting & signalling MOT failures
Lighting & signalling was a recorded failure area in 8.8% of Mazda 3 MOT tests in this dataset. It is most prominent on 2004, 2005 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 | 7,031 | 21.5% |
| 2005 | 22,458 | 21.5% |
| 2006 | 30,751 | 19.9% |
| 2007 | 39,608 | 18.0% |
| 2008 | 46,133 | 18.2% |
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.