wow...
Just like the movie "Gone in 60 seconds"
Had to be an inside job...b/c they would needed access to the coded keys.
Either way, its a new car and BMW would know the VIN number for the stolen cars. So if they take it into a shop or try and register it, then BMW/Law Enforcument would know.
If the cars do go to a 3rd world country, ha well, it would be funny if they tried and get it serviced at a BMW dealer. The VIN would tell all. Can you imagine
"um, excuse me Sir, but is your car stolen?"
As for the vehicle recovery for stolen vehicles (as someone previously mentioned) - that would only work if the car was registered to BMW Assist. Which is probably not the case.