Performance by cohort
2 year bands · 5,125 tests
Pass rate climbs 2.4 points across the cohorts — newer Vivaro 2700 Sportive S/s examples clear the test more reliably than the early cars.
Pass
77.5%
Fail
16.1%
PRS
5.8%
Avg mileage at test
63,046 mi
Pass
80.0%
Fail
12.5%
PRS
6.6%
Avg mileage at test
46,203 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.