some are, some arent, the thing about it is this a reputable dealership, or is it one of these fly by night scams that just care about making money? Ive seen carmax do this once and a guy caught them on it before, so I wouldnt rule out anything.

think about it, in an accident, you rebuild things, depending on the severity of the accident. It doesnt make sense that they would replace every single part that happens to have a potential vin on it. THey have something to hide.