Performance by cohort
2 year bands · 2,227 tests
Pass rate is broadly flat across the cohorts — new and old Xc40 R Design T5 Recharge Auto examples track each other at the test bay.
Pass
93.3%
Fail
5.1%
PRS
1.2%
Avg mileage at test
48,569 mi
Pass
93.7%
Fail
5.2%
PRS
0.8%
Avg mileage at test
36,477 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.