Performance by cohort
2 year bands · 2,765 tests
Pass rate climbs 14.2 points across the cohorts — newer Ds5 examples clear the test more reliably than the early cars.
Pass
79.0%
Fail
16.5%
PRS
4.0%
Avg mileage at test
68,327 mi
Pass
93.2%
Fail
4.7%
PRS
2.1%
Avg mileage at test
41,317 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.