Performance by cohort
2 year bands · 21,407 tests
Pass rate is broadly flat across the cohorts — new and old Puma ST Line Mhev examples track each other at the test bay.
Pass
92.5%
Fail
5.3%
PRS
1.7%
Avg mileage at test
28,854 mi
Pass
93.5%
Fail
3.9%
PRS
2.4%
Avg mileage at test
23,596 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.