Performance by cohort
3 year bands · 214,056 tests
Pass rate climbs 6.4 points across the cohorts — newer XF examples clear the test more reliably than the early cars.
Pass
80.0%
Fail
16.0%
PRS
3.4%
Avg mileage at test
91,993 mi
Pass
88.4%
Fail
8.6%
PRS
2.6%
Avg mileage at test
44,490 mi
Pass
86.4%
Fail
8.0%
PRS
4.7%
Avg mileage at test
25,716 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.