The BCM can be replaced from a donor, BUT, has to be EXACT numbers matching, from what I understand. You can't put one from a SE into a Limited or Limited into Convertible an so on. From what I've read, doing so causes, small but significant quirks to appear , i.e. spoiler works , but not from the console switch (no manual deploy). I haven't done this ,it's what I've researched, because my window switch failed to work one day. Search " repairing the BCM".