Mazda Mx-5 +: emissions & environmental MOT failures
Emissions & environmental was a recorded failure area in 4.2% of Mazda Mx-5 + MOT tests in this dataset. It is most prominent on 1999, 2000 cars.
More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair cost: £100–£600 (rough UK ballpark, not a quote).
Emissions & environmental failures by year
| Model year | Tests | Fail rate |
|---|---|---|
| 1995 | 4,646 | 8.9% |
| 1996 | 7,376 | 8.8% |
| 1997 | 11,839 | 8.9% |
| 1998 | 16,691 | 8.5% |
| 1999 | 18,610 | 10.7% |
| 2000 | 18,689 | 13.0% |
| 2002 | 21,657 | 6.9% |
| 2003 | 28,425 | 7.0% |
| 2004 | 22,072 | 7.3% |
| 2005 | 21,938 | 6.1% |
| 2009 | 25,365 | 2.5% |
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.