Performance by cohort
2 year bands · 114,187 tests
Pass rate climbs 13.0 points across the cohorts — newer Xc90 examples clear the test more reliably than the early cars.
Pass
75.4%
Fail
19.4%
PRS
4.5%
Avg mileage at test
116,154 mi
Pass
88.4%
Fail
9.8%
PRS
1.5%
Avg mileage at test
53,236 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.