BMW X6 M50I AUTO (2021)
Running costs, reliability data, and common problems from 177 real MOT tests.
Annual Cost
£2,192
£183/month
MOT Pass Rate
86%
Good
Road Tax
£195
Flat rate/year
Insurance
Grp 35-50
4395cc Petrol
Solid Option
86% pass rate, £2192/year to run. Close to the national average.
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Annual Running Costs
~30 mpg
Flat rate (post-2017)
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
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 5 years old, 86% of BMW X6 M50I AUTOs from 2021 passed their MOT first time in 2026. That's based on 177 tests across the UK. The average mileage at this age is 26,234 miles.
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How Does It Compare?
Mileage Analysis
26,234
Average miles
37,000
Expected for age
The average 2021 BMW X6 M50I AUTO has 26,234 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 2020 model with a 89% MOT pass rate, while the 2021 model has the lowest at 86%. Consider a different year if reliability is a priority.
Similar Cars to Consider
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About the 2021 BMW X6 M50I AUTO
The 2021 BMW X6 M50I AUTO is a premium performance with a 4395cc petrol engine. 177 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 91% of 2021 cars for MOT pass rates.
With an average of 26,234 miles at 5 years old, BMW X6 M50I AUTO owners tend to use this car less than the typical driver.
2021 BMW X6 M50I AUTO Fuel Costs
The 4395cc 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 X6 M50I AUTO?
Total estimated annual running cost is £2,192 (£183/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 86% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2021 BMW X6 M50I AUTO
At 5 years old, the BMW X6 M50I 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 X6 M50I 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 X6 M50I AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| BMW X6 M50I AUTO(2021) | 86% | £1592 | £195 | Grp 35-50 | £2192 |
| MERCEDES C(2019) | 91% | £1592 | £190 | Grp 35-50 | £2037-£155 |
| PORSCHE CAYENNE(2019) | 95% | £1592 | £190 | Grp 35-50 | £2037-£155 |
| PORSCHE 911(2019) | 97% | £1592 | £190 | Grp 35-50 | £2037-£155 |
| AUDI A6(2020) | 94% | £1592 | £190 | Grp 35-50 | £2037-£155 |
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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