Acura Repair Questions? Ask a Mechanic for Answers ASAP
if you still have the original fob then the cheapest fix is to get your local locksmith to cut you a new mechanical key blank and then move the electronic innards over from the original broken fob to the recut key
if the original fob is broken beyond this then I'm sorry to say its now a problem which requires the dealer level softare to sort out
as you'll need to re-code a new key ( or 2) to match to the car
sorry its not a more DIY answer but this is usually the case with security systems
how broken is the broken key ?
do you think you could remove the electronic guts and transfer them over to a new blank?
usually there's a small screw to undo and the fob then prises apart