Performance by cohort
2 year bands · 6,187 tests
Pass rate climbs 14.1 points across the cohorts — newer Unclassified examples clear the test more reliably than the early cars.
Pass
73.7%
Fail
21.8%
PRS
3.7%
Avg mileage at test
92,659 mi
Pass
87.8%
Fail
9.6%
PRS
1.2%
Avg mileage at test
36,788 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.