Performance by cohort
2 year bands · 1,840 tests
Pass rate is broadly flat across the cohorts — new and old 3008 GT S/s Phev 4x4 Auto examples track each other at the test bay.
Pass
88.7%
Fail
9.4%
PRS
0.9%
Avg mileage at test
31,258 mi
Pass
89.0%
Fail
10.0%
PRS
0.3%
Avg mileage at test
28,147 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.