Performance by cohort
3 year bands · 184,454 tests
Pass rate climbs 16.8 points across the cohorts — newer MX 5 examples clear the test more reliably than the early cars.
Pass
76.8%
Fail
18.9%
PRS
3.5%
Avg mileage at test
72,275 mi
Pass
91.8%
Fail
5.2%
PRS
2.8%
Avg mileage at test
23,063 mi
Pass
93.6%
Fail
3.6%
PRS
2.5%
Avg mileage at test
14,732 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.