Performance by cohort
3 year bands · 5,534 tests
Pass rate climbs 12.0 points across the cohorts — newer Unclassified examples clear the test more reliably than the early cars.
Pass
76.8%
Fail
18.4%
PRS
3.5%
Avg mileage at test
83,971 mi
Pass
87.2%
Fail
7.6%
PRS
5.2%
Avg mileage at test
42,173 mi
Pass
88.9%
Fail
6.8%
PRS
3.8%
Avg mileage at test
18,083 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.