BMW M3 COMPETITION M XDRIVE AUTO (2021)
Running costs, reliability data, and common problems from 588 real MOT tests.
Annual Cost
£2,042
£170/month
MOT Pass Rate
97%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 30-42
2993cc Petrol
Great Choice
97% pass rate, £2042/year to run. 15 points above average.
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Annual Running Costs
~30 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 15 points above the national average of 82%. It also outperforms the BMW brand average of 88%.
At 5 years old, 97% of BMW M3 COMPETITION M XDRIVE AUTOs from 2021 passed their MOT first time in 2026. That's based on 588 tests across the UK. The average mileage at this age is 22,556 miles.
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How Does It Compare?
Mileage Analysis
22,556
Average miles
37,000
Expected for age
The average 2021 BMW M3 COMPETITION M XDRIVE AUTO has 22,556 miles on the clock, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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Best Year to Buy?
The most reliable year is the 2022 model with a 100% MOT pass rate, while the 2021 model has the lowest at 97%. Consider a different year if reliability is a priority.
BMW M3 COMPETITION M XDRIVE AUTO by Year
Similar Cars to Consider
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About the 2021 BMW M3 COMPETITION M XDRIVE AUTO
The 2021 BMW M3 COMPETITION M XDRIVE AUTO is a premium performance with a 2993cc petrol engine. 588 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. It ranks in the top 9% of all 2021 cars for reliability.
With an average of 22,556 miles at 5 years old, BMW M3 COMPETITION M XDRIVE AUTO owners tend to use this car less than the typical driver.
2021 BMW M3 COMPETITION M XDRIVE AUTO Fuel Costs
The 2993cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 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 BMW M3 COMPETITION M XDRIVE AUTO?
Total estimated annual running cost is £2,042 (£170/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 97% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 BMW M3 COMPETITION M XDRIVE AUTO
At 5 years old, the BMW M3 COMPETITION M XDRIVE AUTO offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Common Issues to Watch For
Based on the 2021 BMW M3 COMPETITION M XDRIVE AUTO's fuel type, age, and engine size, these are the most likely problem areas to check.
Oil Consumption
Low riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2021 BMW M3 COMPETITION M XDRIVE AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| BMW M3 COMPETITION M XDRIVE AUTO(2021) | 97% | £1592 | £195 | Grp 30-42 | £2042 |
| BMW 5 SERIES(2019) | 92% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| BMW X3(2019) | 92% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| MERCEDES GLC(2019) | 93% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| BMW X5(2019) | 92% | £1592 | £190 | Grp 30-42 | £2037-£5 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
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