Performance by cohort
2 year bands · 6,421 tests
Pass rate climbs 3.0 points across the cohorts — newer Unclassified examples clear the test more reliably than the early cars.
Pass
80.6%
Fail
15.2%
PRS
3.5%
Avg mileage at test
99,770 mi
Pass
83.7%
Fail
12.7%
PRS
3.4%
Avg mileage at test
88,416 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.