MAZDA 6 (2021)
Running costs, common problems, and reliability data based on 118 real MOT tests in 2024.
MOT Pass Rate
93%
Total Tests (2024)
118
Avg Mileage
26,540 mi
Est. Annual Cost
£1,772
Is the 2021 MAZDA 6 reliable?
Excellent reliability. Very few MOT failures. That's 11 points above the national average of 82%. It also outperforms the MAZDA brand average of 81%.
At 3 years old, 93% of MAZDA 6s from 2021 passed their MOT first time in 2024. That's based on 118 tests across the UK. The average mileage at this age is 26,540 miles.
How does the 2021 MAZDA 6 compare?
Mileage Analysis
The average 2021 MAZDA 6 has 26,540 miles on the clock, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.
Best year to buy a MAZDA 6?
The most reliable year is the 2020 model with a 94% MOT pass rate, while the 2002 model has the lowest at 54%. The 2021 sits between the two at 93%.
How much does a 2021 MAZDA 6 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MAZDA 6 by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 93% | 118 | 26,540 mi |
| 2020 | 94% | 1,786 | 31,783 mi |
| 2019 | 91% | 7,381 | 44,030 mi |
| 2018 | 89% | 5,151 | 55,840 mi |
| 2017 | 87% | 7,764 | 68,812 mi |
| 2016 | 84% | 11,771 | 78,854 mi |
| 2015 | 82% | 11,898 | 88,374 mi |
| 2014 | 80% | 11,144 | 97,838 mi |
| 2013 | 80% | 7,682 | 103,079 mi |
| 2012 | 75% | 5,149 | 103,925 mi |
| 2011 | 74% | 7,535 | 117,021 mi |
| 2010 | 73% | 9,673 | 121,783 mi |
| 2009 | 73% | 7,396 | 124,353 mi |
| 2008 | 71% | 6,498 | 124,138 mi |
| 2007 | 68% | 4,401 | 109,611 mi |
| 2006 | 69% | 2,430 | 105,119 mi |
| 2005 | 64% | 1,596 | 100,805 mi |
| 2004 | 62% | 763 | 99,968 mi |
| 2003 | 63% | 356 | 98,803 mi |
| 2002 | 54% | 140 | 98,087 mi |
Checking a specific MAZDA 6?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 MAZDA 6
The 2021 MAZDA 6 is a family car with a 1998cc petrol engine. 118 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 26,540 miles at 3 years old, MAZDA 6 owners drive about as much as the UK average.
2021 MAZDA 6 Fuel Costs
The 1998cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 MAZDA 6?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 93% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MAZDA 6 Reliability Trend
Newer MAZDA 6s show better MOT pass rates than older ones, with an average improvement of 18 percentage points.
Buying a Used 2021 MAZDA 6
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. If you're flexible on year, the 2020 model has the highest pass rate at 94%.
Alternatives to the 2021 MAZDA 6
The MAZDA 6 is actually the most reliable option among similar petrol family cars from this era. Here are comparable petrol cars with similar engines:
- VOLKSWAGEN GOLF (2019) 92% pass rate (-1%) from 89,653 tests
- NISSAN QASHQAI (2020) 93% pass rate (same) from 52,321 tests
- MINI COOPER (2019) 92% pass rate (-1%) from 52,140 tests
- HYUNDAI TUCSON (2019) 90% pass rate (-3%) from 42,920 tests