I have a car that uses a wireless key. After browsing the web trying to find more about the security, I found that you could buy a programmer that connects to the car's data port and programs a new key. What was surprising to me was how relatively easy it is to buy such a device and how quick the programming process was (about 30 seconds). A thief would have to get an entry into the car first (breaking a window, perhaps), but once that is done, it's relatively easy to just drive off with a newly programmed key. What I did was to disable to data port, not permanently, but more of a need to use basis. Since it works on obfuscation, this is not a type of security to be mass produced. Not knowing how exactly the port is disabled, it will take a long time to make it work, so I don't expect a thief to start taking the car apart. Wonder if you can claim for the insurance that the port is disabled. There are many other ways to steal a car, I just want to prevent the easy ones known today.