How to repair an Anki car that won't allow a firmware upgrade

How to repair an Anki car that won't allow a firmware upgrade

I have an old Anki Drive car (which I bought used) and which is not allowing a firmware upgrade. Anki no longer make or sell this car, and they do not do repairs. Does anyone know if there is a way to repair this? I have spare cars from which I could get spare chassis parts but how would I then tell the new chassis that it is a Spektrix and not the chassis I swap in?