For apps like Tesla's, two-factor authentication is a vital security feature, especially since it lets you control the car remotely. But it's something that's been missing all this time. Elon Musk, Tesla's chief, said last year that two-factor would be coming to its app, but he didn't say when. But now, he's giving us a clue that it's coming soon. Musk admits that it's "embarrassingly late," but it is going through final validation.
The process for Tesla's app will use SMS- or app-based authentication. While the latter is more secure, the SMS option is available for those who can't use authenticator apps
Source: Engadget