Bmw 4 series
Reliability, running costs, and MOT data across 7 years from 3,242 real MOT tests.
Avg Pass Rate
90%
Total Tests
3,242
Best Year
2018 (96%)
Years Covered
7
How reliable is the Bmw 4 series?
Bmw 4 series by Year
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About the Bmw 4 series
The Bmw 4 series has been tested 3,242 times in 2024 MOT data across 7 model years (2013 to 2019), with an average pass rate of 90%. That's comfortably above the national average of 82%, making it a reliable choice. Available as petrol and diesel.
Best and Worst Years
The 2018 model is the most reliable with a 96% pass rate from 405 tests. The 2016 model has the lowest at 85%. The 11 point spread between years means reliability varies somewhat, but no year is dramatically different.
Reliability Trend
Newer BMW 4 SERIESs show better MOT pass rates than older ones, with an average improvement of 5 percentage points.
Mileage Across Years
The oldest model in our data (2013) averages 97,268 miles, while the newest (2019) averages 22,960 miles.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.