Performance by cohort
2 year bands · 9,112 tests
Pass rate is broadly flat across the cohorts — new and old Vivaro 3100 Sportive S/s examples track each other at the test bay.
Pass
80.4%
Fail
13.5%
PRS
4.6%
Avg mileage at test
63,820 mi
Pass
80.3%
Fail
12.5%
PRS
5.7%
Avg mileage at test
49,785 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.