My own experience with this issue was bizarre, the yellowing literally happened overnight. The car had been parked out in the sun for most of the previous day and when I turned the car on in the morning I saw the yellow band and was shocked it happened so fast.
Anyway my SC said April/May this year for the updated screen, I would suggest anyone with the issue they get it reported 'in the system' before their warranty runs out, that way it becomes a known issue they cannot resolve until new parts arrive and you won't be left hung out to dry if your warranty expires.
Anyway my SC said April/May this year for the updated screen, I would suggest anyone with the issue they get it reported 'in the system' before their warranty runs out, that way it becomes a known issue they cannot resolve until new parts arrive and you won't be left hung out to dry if your warranty expires.