BMW 420D M SPORT MHEV AUTO (2020)
Running costs, common problems, and reliability data based on 130 real MOT tests in 2024.
MOT Pass Rate
98%
Total Tests (2024)
130
Avg Mileage
33,858 mi
Est. Annual Cost
£1,772
Is the 2020 BMW 420D M SPORT MHEV AUTO reliable?
Excellent reliability. Very few MOT failures. That's 16 points above the national average of 82%. It also outperforms the BMW brand average of 88%.
At 4 years old, 98% of BMW 420D M SPORT MHEV AUTOs from 2020 passed their MOT first time in 2024. That's based on 130 tests across the UK. The average mileage at this age is 33,858 miles.
How does the 2020 BMW 420D M SPORT MHEV AUTO compare?
Mileage Analysis
The average 2020 BMW 420D M SPORT MHEV AUTO has 33,858 miles on the clock, which is in line with the expected 29,600 miles for a 4-year-old car, suggesting normal everyday use.
How much does a 2020 BMW 420D M SPORT MHEV AUTO 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.
BMW 420D M SPORT MHEV AUTO by Year
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About the 2020 BMW 420D M SPORT MHEV AUTO
The 2020 BMW 420D M SPORT MHEV AUTO is a premium with a 1995cc petrol engine. 130 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 5% of all 2020 cars for reliability.
With an average of 33,858 miles at 4 years old, BMW 420D M SPORT MHEV AUTO owners drive about as much as the UK average.
2020 BMW 420D M SPORT MHEV AUTO Fuel Costs
The 1995cc 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 2020 BMW 420D M SPORT MHEV AUTO?
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 98% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
BMW 420D M SPORT MHEV AUTO Reliability Trend
Older BMW 420D M SPORT MHEV AUTOs tend to have better MOT pass rates than newer ones, with an average decline of 5 percentage points across model years.
Buying a Used 2020 BMW 420D M SPORT MHEV AUTO
At 4 years old, the BMW 420D M SPORT MHEV AUTO offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Alternatives to the 2020 BMW 420D M SPORT MHEV AUTO
The BMW 420D M SPORT MHEV AUTO is actually the most reliable option among similar petrol premiums from this era. Here are comparable petrol cars with similar engines:
- LAND ROVER DISCOVERY SPORT R-DYN SE D A (2020) 90% pass rate (-8%) from 5,505 tests
- BMW 520D M SPORT MHEV AUTO (2021) 89% pass rate (-9%) from 3,423 tests
- BMW 320D M SPORT MHEV AUTO (2021) 91% pass rate (-7%) from 3,336 tests
- VOLVO XC90 R-DESIGN B5 MHEV AWD AUTO (2021) 90% pass rate (-8%) from 2,911 tests