Performance by cohort
2 year bands · 39,444 tests
Pass rate climbs 3.9 points across the cohorts — newer Celerio examples clear the test more reliably than the early cars.
Pass
85.3%
Fail
9.5%
PRS
5.0%
Avg mileage at test
41,990 mi
Pass
89.2%
Fail
6.0%
PRS
4.7%
Avg mileage at test
27,159 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.