Performance by cohort
2 year bands · 15,093 tests
Pass rate drops 1.2 points across the cohorts — recent Transporter T28 Startline Tdi examples are doing worse than the early cars at the same tested age.
Pass
82.8%
Fail
12.7%
PRS
3.8%
Avg mileage at test
59,571 mi
Pass
81.7%
Fail
13.5%
PRS
4.2%
Avg mileage at test
43,521 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.