Originally Posted by DT_
I have never tried it with the old FZD, therefore i cant confirm for sure that this is what would happen but from experience common sense tells me that it would. If this is the case then its not the saavyness of the dealership or the tech but just the fact that their hands are tied by the equipment.
I ran into exactly this with a sat radio module make for a production date one month prior to my car (antenna connection was different). Although the module would have probably worked fine the system stopped the programming with a wrong part number detected / replace part message and halted. There was no way for the tech to continue as the system would not allow it.
Full kudos for my tech for trying. His hands were tied.