Performance by cohort
2 year bands · 1,349 tests
Pass rate climbs 1.1 points across the cohorts — newer Xc60 Rdesgn Pro T8 Rchrg Awd A examples clear the test more reliably than the early cars.
Pass
89.9%
Fail
6.9%
PRS
3.1%
Avg mileage at test
37,641 mi
Pass
91.0%
Fail
7.1%
PRS
0.6%
Avg mileage at test
32,847 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.