Performance by cohort
2 year bands · 2,081 tests
Pass rate drops 2.2 points across the cohorts — recent R 1250 GS TE examples are doing worse than the early cars at the same tested age.
Pass
98.0%
Fail
1.5%
PRS
0.5%
Avg mileage at test
11,136 mi
Pass
95.8%
Fail
2.2%
PRS
1.7%
Avg mileage at test
10,521 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.