A friend has a 2008 X5 which he bought a few years ago but not from a BMW dealer. He asked me about Bluetooth and the module in an X5 relating to same. Basically he gave the car to someone for a test drive and when he got it back BT wasn't working. It was beforehand.

He seems to think either the module was taken out and possibly replaced with another faulty unit. Is this possible? I know there are modules in the boot but don't know if there is a plug-in module specifically for BT. I'd have thought something else would have stopped as well.

Also, the pairing code generated to sync with a phone. Would it be the same number generated all the time from a module in the car or would it change? Would this pairing code be printed on the outside of the module? Just wondering if there is a way to determine if a unit was taken/replaced.