Performance by cohort
2 year bands · 2,779 tests
Pass rate drops 3.8 points across the cohorts — recent Trafic Ll30 B Ness+ Energy Dci examples are doing worse than the early cars at the same tested age.
Pass
79.4%
Fail
16.6%
PRS
2.5%
Avg mileage at test
60,254 mi
Pass
75.7%
Fail
18.2%
PRS
4.4%
Avg mileage at test
49,683 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.