Performance by cohort
2 year bands · 3,727 tests
Pass rate climbs 1.8 points across the cohorts — newer X2 Sdrive20i Sport Auto examples clear the test more reliably than the early cars.
Pass
89.1%
Fail
8.0%
PRS
2.9%
Avg mileage at test
34,517 mi
Pass
90.9%
Fail
6.3%
PRS
2.8%
Avg mileage at test
25,529 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.