Hacking a Tesla car from the Android phone is possible:
Hacking a Tesla is a thing we’ve seen before, but this time a team of security researchers at company Promon managed to locate, unlock, and steal a car using just an Android app. Every Tesla model comes with a companion smartphone application for Android and iOS that allows owners to do basic things such as checking the battery level and the charging status, locate the vehicle, and flash the lights to find it in the parking lot. And while these certainly come in handy, they can also be used by hackers to drive away by simply compromising the Android application.