well there you go
or rather not go (if you're lucky)
The people designing the car's network thingummies should put in 1 usb port in the ECU that accepts one command "Download" and download the car's current status, and any log files from the ECU.
But people want conveience in which case the manufacturers should put warning notices saying that their cars are insecure and could be stolen/interfered with by criminals
"Oh your new car has internet capabilty"
"yes.. and thanks to the shitty security I've got someone in China driving, someone in Russia changing gear and someone in the US braking"