Performance by cohort
2 year bands · 11,574 tests
Pass rate climbs 4.7 points across the cohorts — newer Nv400 examples clear the test more reliably than the early cars.
Pass
68.4%
Fail
24.6%
PRS
6.1%
Avg mileage at test
123,028 mi
Pass
73.1%
Fail
19.1%
PRS
6.8%
Avg mileage at test
97,149 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.