Performance by cohort
2 year bands · 2,732 tests
Pass rate climbs 1.7 points across the cohorts — newer Corsa SE Turbo examples clear the test more reliably than the early cars.
Pass
84.5%
Fail
11.5%
PRS
3.4%
Avg mileage at test
29,022 mi
Pass
86.2%
Fail
9.5%
PRS
4.3%
Avg mileage at test
23,679 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.