Some automakers have even expanded the remote start button's functionality and/or use a different icon — that's why BMW has a diamond button on its key fob, for instance. While RES is now ...

Do note that remote start is mostly available on mid- to high-trim models as standard. Aside from the key fob and smartphone app, newer models allow activation through voice assistants.

Start your car remotely with your key fob In some cars, your car key fob can remote start your vehicle during chilly days, depending on whether or not idling is legal in your state.