Performance by cohort
3 year bands · 242,587 tests
Pass rate climbs 20.5 points across the cohorts — newer Defender examples clear the test more reliably than the early cars.
Pass
73.7%
Fail
20.9%
PRS
4.6%
Avg mileage at test
115,454 mi
Pass
93.4%
Fail
2.8%
PRS
1.1%
Avg mileage at test
40,139 mi
Pass
94.2%
Fail
3.9%
PRS
1.5%
Avg mileage at test
40,918 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.