Performance by cohort
2 year bands · 1,787 tests
Pass rate drops 3.5 points across the cohorts — recent Berlingo 1000 Driver Bluehdi examples are doing worse than the early cars at the same tested age.
Pass
76.8%
Fail
12.6%
PRS
10.7%
Avg mileage at test
52,284 mi
Pass
73.4%
Fail
16.7%
PRS
9.3%
Avg mileage at test
43,179 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.