No obd port business required these tools amplify the signal hugely way more than the makers intended have a nose around youtube (such as this on a Merc but the method is the same manufacturer really is little in safety unless the keyless system is off -
https://www.youtube.com/watch?v=uZMhCWaGw-o) although the same guy has shown it on an F10 as well
)
A few BMW's have gone this way in the UK. Signal blocking bags work but are clumbersome and there is no way to turn CA off. Honestly, whilst clumbersome use the bag. In theory even without CA once access is gained the same method of starting would work on any car as well.
In the UK at least replicating the signal and breaking into the home are the current popular theft methods - in the last method case they dont even bother with hanoi (two in one - steal from the house and then steal the car to getaway) style burglary now.
The first theft via keyless hacking (that I am aware of in the UK) which was in Ireland, this was crude at best:
https://www.youtube.com/watch?v=Ti79UhY0TGc
Since then though this was one of the most quickly executed.
https://www.youtube.com/watch?v=i38qQsuEYOs
Also, look out for anyone just generally nosing around there has been a spate of steering wheel thefts in the previous year or so mostly on BMW's in Europe, it does seem this trend has popped up in the UK on occasion, but less frequently. Sweden got hit massively (one forum user being hit for their own X5 steering wheel and airbag and subsequently the following evening the 1 series courtesy car they had!), the biggest difference being in Sweden there is no alarm system on BMW's (and now why they fit additional security stickers from factory).
This one for Ilford on an X5 and 640, although I suspect from the video the car was not locked on the 6 as at no point did the mirrors unfold or the indicators flash.
http://www.ilfordrecorder.co.uk/news...heft-1-4941118