Security experts found that Teslas are vulnerable to certain kinds of hacks. One expert, Brian DeMuth, said there are no easy ways to prevent it, but you can take some measures.
There are a few things that can reduce the risk if you are willing to accept diminished functionality in the car. For example, the telematics unit can be removed from the vehicle to eliminate attacks over the cellular network, but this also will prevent mobile apps and other remote functionality from working. Removing the telematics unit could also trigger warnings and other errors to appear in the instrument cluster or infotainment system.