Performance by cohort
2 year bands · 5,765 tests
Pass rate is broadly flat across the cohorts — new and old Boxer 335 Pro L2h2 Bhdi examples track each other at the test bay.
Pass
75.5%
Fail
17.9%
PRS
5.5%
Avg mileage at test
60,427 mi
Pass
76.1%
Fail
15.4%
PRS
7.9%
Avg mileage at test
49,261 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.