Performance by cohort
2 year bands · 4,606 tests
Pass rate climbs 2.1 points across the cohorts — newer Vivaro 2900 Edition S/s examples clear the test more reliably than the early cars.
Pass
75.5%
Fail
15.0%
PRS
8.5%
Avg mileage at test
61,146 mi
Pass
77.7%
Fail
12.0%
PRS
9.3%
Avg mileage at test
44,898 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.