2021 Mazda 3 MOT pass rate: 92.6% (7,562 tests)
Is the 2021 3 getting worse?
Pass rate of 2021-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2024 | 93.0% +2.3 vs same-age |
|
| 2025 | 92.3% +2.1 vs same-age |
The raw rate normally falls as cars age. The “vs same-age” figure compares this cohort with all UK cars registered in the same year, so normal ageing is not mistaken for a bad model year.
What fails on a 2021 3
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Tyres | 409 | 53.3% |
| 2 | Brakes | 142 | 18.5% |
| 3 | Visibility | 109 | 14.2% |
| 4 | Noise, emissions and leaks | 37 | 4.8% |
| 5 | Suspension | 24 | 3.1% |
| 6 | Lamps, reflectors and electrical equipment | 18 | 2.3% |
All 3 years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2004 | 2,257 | 58.6% | -5.7 pts | 96,388 |
| 2005 | 7,744 | 59.0% | -5.5 pts | 102,678 |
| 2006 | 11,162 | 60.6% | -3.8 pts | 103,732 |
| 2007 | 15,111 | 61.4% | -3.8 pts | 101,863 |
| 2008 | 18,261 | 60.4% | -4.7 pts | 97,981 |
| 2009 | 22,086 | 64.3% | -2.1 pts | 98,248 |
| 2010 | 24,373 | 66.7% | -0.7 pts | 96,826 |
| 2011 | 15,945 | 66.4% | -2.7 pts | 90,221 |
| 2012 | 14,586 | 72.1% | +0.9 pts | 86,556 |
| 2013 | 15,195 | 75.5% | +2.1 pts | 75,570 |
| 2014 | 24,835 | 74.7% | -1.1 pts | 72,514 |
| 2015 | 34,878 | 75.8% | -2.9 pts | 67,232 |
| 2016 | 31,393 | 77.2% | -4.1 pts | 58,044 |
| 2017 | 24,332 | 78.6% | -5.4 pts | 48,620 |
| 2018 | 20,748 | 86.1% | -0.3 pts | 39,441 |
| 2019 | 12,909 | 91.6% | +3.3 pts | 31,248 |
| 2020 | 12,210 | 92.5% | +2.6 pts | 25,514 |
| 2021 (this page) | 7,562 | 92.6% | +2.2 pts | 24,456 |
| 2022 | 2,398 | 94.9% | +3.6 pts | 22,732 |
Weighing up which year to buy? See the full ranking: Mazda 3 years to avoid.
- Free MOT history checkThe exact car’s failures, advisories and mileage trail — sellers can’t edit it
- Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
- XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
- Autel UK testersAutel professional-grade diagnostic testers
FAQs
Is a 2021 Mazda 3 reliable?
2021-registered examples passed 92.6% of their MOT tests (7,562 tests, 2023–2025), +2.2 points versus all UK cars registered in the same year. At roughly 5 years old with a median 24,456 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2021 3?
The median tested example shows 24,456 miles. Anything far beyond that isn't automatically bad — a motorway-mile car with consistent service records often beats a low-mileage school-run car — but price accordingly and scrutinise the mileage trail for gaps or drops.
Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts (96 million Class 4 initial tests; retests excluded). Only vehicles old enough for a routine first MOT are included. Age-adjusted figures compare the model-year cohort with all vehicles of the same registration year tested in the same calendar year. Contains public sector information licensed under OGL v3.0.