The bad guys have figured out how to crack them. No word on BMW but you never know. Be careful out there!
...investigators tested 35 different makes and models of cars using the car-hacking device and were able to start and drive away about half the vehicles.
Among the vulnerable cars were the 2015 Ford Edge, 2016 Chevrolet Impala, 2013 Volkswagen Jetta Hybrid and the 2017 Toyota Camry, NICB Chief Communication Officer Roger Morris said.
The device is actually two sets of equipment. When the unsuspecting victim parks and locks the car, a thief standing not far away holds the first device, which is used to pick up and amplify the electronic signal as it is sent between the car and the key fob.
That signal is relayed to a second device, which tricks the car into thinking that the key fob is near the car. That disarms the security system, unlocks the door and authenticates the engine to start.
http://www.latimes.com/business/la-fi-hy-mystery-car-stealing-device-20161207-story.html