As nifty as all the technology is in new cars, there comes a point when there really is too much dependance on technology and software. For example, a modern car uses an operating system based on Usenix Enigma - and recently it was discovered that playing a song laced with malicious code in the media player cause the OS to fall prey to a hacker. It's that simple. Play a song, get malware in your car. That sucks. The problem is that these cars are so segmented that things are patchworked together and that is leaving a lot of room for error. It needs to be fixed.
As an example, Savage revealed that his team had been able to get full control of a vehicle by encoding computer instructions into a song. If the carefully crafted .WMA track was played from a CD, the attacker could get full control – the smuggled code would exploit weaknesses in the playback software to commandeer operations.