I did a search and haven't seen the question here or in Model Y forum. Does anyone know if a key card can be programmed to work for two different cars? I would prefer to only have to carry one card for both cars. I assume since its the cars recognizing the frequency of the card and not the card doing any computing, that this could work. I asked the service center but who knows when they'll get back to me. Thought someone here might've tried this already.