This is proving to be a fertile ground for cyber security researchers. I wonder, how many dissertations this continual issue is going to generate? One of the under lying issue here is technology being pushed beyond what it was originally designed for and lacking the underlying high security the applications need. Or it is just poor coding and lack of understanding of basic security by the vendors!
Here is another range of vulnerable cars discovered:
Researchers find bugs allowing access, remote control of cars – The Record by Recorded Future
Above is a photograph of my electronic car key in an RFID case on my key ring:
Clive Catton MSc (Cyber Security) – by-line and other articles