Performance by cohort
2 year bands · 1,390 tests
Pass rate is broadly flat across the cohorts — new and old 2008 GT Line EV examples track each other at the test bay.
Pass
87.3%
Fail
7.9%
PRS
4.5%
Avg mileage at test
30,452 mi
Pass
87.6%
Fail
9.8%
PRS
2.6%
Avg mileage at test
29,089 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.