I haven't seen one break, but I have seen them corrode. When was the last time the car had an inspection II? They're supposed to lube all jambs and latches.
Is the thing flopping around in there, or is it stuck? When the door won't close, I usually attack it with a bit of PB, then teflon. Some of them are mothers, esp around here, but it usually does the trick.
best, whit