The Victor crew has written about car hacking before. It seems to have escalated to apps being used to hack some cars now. Breaking into certain GPS Tracking apps, the hacker claims to have the ability to even stop engines, as reported by MotherBoard.
The apps he has hacked, called iTrack and ProTrack, are two apps where companies can monitor and manage their fleet vehicles. The hacker found that the apps have default password of 123456 when they sign up. The hacker said he was trying to target the companies, not the users.
Both apps are made in China.