They'll replace it for you without complaint, but as an Apple Service Provider tech I can tell you, don't get your hopes up about the upgrade. Apple supplies it

They'll replace it for you without complaint, but as an Apple Service Provider tech I can tell you, don't get your hopes up about the upgrade. Apple supplies its providers with parts for machines well after their warranties are all up; for a part like that, that's had problems all across the board, doubly so.