MINI ONE (2021)
Running costs, common problems, and reliability data based on 2,356 real MOT tests in 2024.
MOT Pass Rate
93%
Total Tests (2024)
2,356
Avg Mileage
21,212 mi
Est. Annual Cost
£1,582
Is the 2021 MINI ONE reliable?
Excellent reliability. Very few MOT failures. That's 11 points above the national average of 82%. It also outperforms the MINI brand average of 84%.
At 3 years old, 93% of MINI ONEs from 2021 passed their MOT first time in 2024. That's based on 2,356 tests across the UK. The average mileage at this age is 21,212 miles.
How does the 2021 MINI ONE compare?
Mileage Analysis
The average 2021 MINI ONE has 21,212 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 MINI ONE?
The most reliable year is the 2020 model with a 94% MOT pass rate, while the 2003 model has the lowest at 67%. The 2021 sits between the two at 93%.
How much does a 2021 MINI ONE 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.
MINI ONE by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2022 | 94% | 138 | 20,160 mi |
| 2021 | 93% | 2,356 | 21,212 mi |
| 2020 | 94% | 1,884 | 24,926 mi |
| 2019 | 91% | 2,504 | 31,716 mi |
| 2018 | 92% | 2,625 | 35,237 mi |
| 2017 | 91% | 9,126 | 44,787 mi |
| 2016 | 90% | 14,249 | 52,236 mi |
| 2015 | 89% | 18,016 | 58,665 mi |
| 2014 | 88% | 11,021 | 66,312 mi |
| 2013 | 84% | 11,674 | 69,388 mi |
| 2012 | 84% | 6,640 | 73,564 mi |
| 2011 | 79% | 1,416 | 81,305 mi |
| 2010 | 79% | 844 | 83,055 mi |
| 2009 | 71% | 624 | 81,764 mi |
| 2008 | 69% | 659 | 90,766 mi |
| 2007 | 68% | 587 | 85,270 mi |
| 2006 | 74% | 382 | 98,556 mi |
| 2005 | 72% | 436 | 97,952 mi |
| 2004 | 68% | 348 | 101,925 mi |
| 2003 | 67% | 232 | 104,829 mi |
| 2002 | 72% | 109 | 113,107 mi |
Checking a specific MINI ONE?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 MINI ONE
The 2021 MINI ONE is a small family car with a 1499cc petrol engine. 2,356 of these vehicles were MOT tested in 2024, making it a reasonably common sight 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 21,212 miles at 3 years old, MINI ONE owners drive about as much as the UK average.
2021 MINI ONE Fuel Costs
The 1499cc petrol engine offers a reasonable balance between performance and economy. Expect around 42 mpg in mixed driving, which works out to roughly £1,137 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 MINI ONE?
Total estimated annual running cost is £1,582 (£132/month), broken down as £1137 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.
MINI ONE Reliability Trend
Newer MINI ONEs show better MOT pass rates than older ones, with an average improvement of 18 percentage points.
Buying a Used 2021 MINI ONE
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 MINI ONE
The MINI ONE is actually the most reliable option among similar petrol small family cars from this era. Here are comparable petrol cars with similar engines:
- VOLKSWAGEN GOLF (2019) 92% pass rate (-1%) from 89,653 tests
- VAUXHALL CORSA (2019) 88% pass rate (-5%) from 68,639 tests
- NISSAN QASHQAI (2020) 93% pass rate (same) from 52,321 tests
- MINI COOPER (2019) 92% pass rate (-1%) from 52,140 tests