get a new key and best get it from the dealership - dont go to the "sayyara parts" shops or the little shops that just deal in keys, you will end up spending more than the dealer.

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)