Performance by cohort
2 year bands · 2,548 tests
Pass rate climbs 3.1 points across the cohorts — newer Discovery Spt Rdyn SE D Mhev A examples clear the test more reliably than the early cars.
Pass
84.8%
Fail
8.7%
PRS
6.5%
Avg mileage at test
37,946 mi
Pass
87.9%
Fail
8.7%
PRS
2.7%
Avg mileage at test
31,360 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.