Performance by cohort
2 year bands · 3,628 tests
Pass rate drops 1.9 points across the cohorts — recent M440i Xdrive Mhev Auto examples are doing worse than the early cars at the same tested age.
Pass
93.2%
Fail
6.5%
PRS
0.3%
Avg mileage at test
26,819 mi
Pass
91.3%
Fail
7.0%
PRS
1.0%
Avg mileage at test
22,637 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.