Performance by cohort
2 year bands · 1,391 tests
Pass rate is broadly flat across the cohorts — new and old Xc90 R Design T8 Rcharge Awd A examples track each other at the test bay.
Pass
90.6%
Fail
6.1%
PRS
3.3%
Avg mileage at test
43,942 mi
Pass
89.8%
Fail
7.7%
PRS
2.3%
Avg mileage at test
33,725 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.