Performance by cohort
2 year bands · 14,243 tests
Pass rate climbs 5.5 points across the cohorts — newer California examples clear the test more reliably than the early cars.
Pass
82.7%
Fail
14.9%
PRS
1.9%
Avg mileage at test
64,689 mi
Pass
88.2%
Fail
9.5%
PRS
1.6%
Avg mileage at test
34,739 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.