Congratulations -- your cars internal workings are now connected to the internet. Your car is now hackable either through your android device or through the bluetoot OBD II dongle.

It would take skills and dedication to gain access -- first they need to hack your phone, then they need to circumvent whatever security measures the OBD II - dongle may have (or not have). After that they may send virtually whatever command they like through the car computer network (CAN-BUS). Turn on the fan, Stopping the engine, messing with your brakes, ... virtually any component in your car can be controlled through the CAN-BUS network. Gain acces, and you can send ANY command to ANY component.

Here's a nifty youtube demonstration: https://www.youtube.com/watch?v=MK0SrxBC1xs
Here's a writeup: https://blog.kaspersky.com/blackhat-jeep-cherokee-hack-explained/9493/
In the example above, the researcher hacked the entertainment system, which is connected both to the CAN-BUS network and internet.


I really like your nice setup, but it's not something I would do in my car, for the reasons above. At the very least, I would disconnect the android device form the internett while connected to the OBD II dongle.