This is a coil and it's housing has cracked. However we can't tell how much damaged it is inside. If you didn't damage it yourself while cleaning the card then it will probably work but not for too long and you may hear some coil whine. Probably age and high temps have done this. Your GPU is going to fail in the near future, it's too old and it doesn't worth fixing that component, since there may be damage somewhere else (that's not visible). You should be prepared to get a new GPU when it stops working. Good luck.