Performance by cohort
2 year bands · 2,515 tests
Pass rate drops 1.9 points across the cohorts — recent Nv250 Acenta Dci examples are doing worse than the early cars at the same tested age.
Pass
75.9%
Fail
17.6%
PRS
5.7%
Avg mileage at test
55,324 mi
Pass
74.0%
Fail
18.3%
PRS
7.0%
Avg mileage at test
43,335 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.