Hello ,can i just swap my bcm or does it have to be programmed, my old bcm got wet from a leaking back glass ,which bcm is located behind the back seat ,did not know went through a car wash was leaking car shut off and has no power now bcm was ruined ,sent it off they said cannot be repaired because of water , so have u guys ever just replaced a bcm ,my car is a 2011 jag xjl