Performance by cohort
2 year bands · 1,623 tests
Pass rate climbs 2.4 points across the cohorts — newer Xc90 Rdesign Pro B5 Mhev Awd A examples clear the test more reliably than the early cars.
Pass
87.3%
Fail
12.5%
PRS
0.2%
Avg mileage at test
35,445 mi
Pass
89.7%
Fail
9.1%
PRS
0.9%
Avg mileage at test
34,220 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.