Performance by cohort
2 year bands · 1,431 tests
Pass rate is broadly flat across the cohorts — new and old Xc90 Inscription B5 Mhev Awd A examples track each other at the test bay.
Pass
88.6%
Fail
10.6%
PRS
0.3%
Avg mileage at test
37,098 mi
Pass
88.8%
Fail
10.0%
PRS
0.6%
Avg mileage at test
33,846 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.