Performance by cohort
2 year bands · 3,913 tests
Pass rate drops 1.2 points across the cohorts — recent Grandland X Sri Nav Turbo A examples are doing worse than the early cars at the same tested age.
Pass
90.9%
Fail
6.7%
PRS
2.0%
Avg mileage at test
26,973 mi
Pass
89.7%
Fail
7.9%
PRS
2.0%
Avg mileage at test
27,552 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.