Performance by cohort
2 year bands · 4,911 tests
Pass rate climbs 1.3 points across the cohorts — newer X3 Xdrive30e M Sport Auto examples clear the test more reliably than the early cars.
Pass
89.7%
Fail
8.3%
PRS
1.4%
Avg mileage at test
42,350 mi
Pass
91.0%
Fail
7.1%
PRS
1.6%
Avg mileage at test
33,480 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.