The primary reason I use Bluetooth on my smartphone is for hands-free use in my vehicle. If my smartphone’s OS were patched (it isn’t and I don’t see any patch yet), do I still have an issue with the vehicle?
According to the article, yes. If your car's Bluetooth is connected in any way to the car's computer system the car could be hijacked by a malicious hacker. Unfortunately, most, if not all, of them are.