Performance by cohort
2 year bands · 4,911 tests
Pass rate is broadly flat across the cohorts — new and old Tourneo Custom 320 TI Eblue A examples track each other at the test bay.
Pass
81.3%
Fail
14.1%
PRS
4.2%
Avg mileage at test
50,697 mi
Pass
81.0%
Fail
12.4%
PRS
5.8%
Avg mileage at test
39,645 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.