Performance by cohort
2 year bands · 5,032 tests
Pass rate climbs 11.9 points across the cohorts — newer Unclassified examples clear the test more reliably than the early cars.
Pass
78.3%
Fail
17.4%
PRS
3.0%
Avg mileage at test
86,857 mi
Pass
90.2%
Fail
7.5%
PRS
2.1%
Avg mileage at test
36,519 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.