Performance by cohort
2 year bands · 4,254 tests
Pass rate climbs 6.3 points across the cohorts — newer Vivaro E 3100 Dynamic examples clear the test more reliably than the early cars.
Pass
76.0%
Fail
17.7%
PRS
3.6%
Avg mileage at test
23,505 mi
Pass
82.3%
Fail
11.4%
PRS
4.8%
Avg mileage at test
23,198 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.