Performance by cohort
2 year bands · 8,552 tests
Pass rate climbs 3.1 points across the cohorts — newer Glr examples clear the test more reliably than the early cars.
Pass
79.7%
Fail
13.3%
PRS
6.6%
Avg mileage at test
16,130 mi
Pass
82.8%
Fail
10.5%
PRS
5.9%
Avg mileage at test
10,813 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.