Sorry for replying in English but this is very interesting as I always thought that BMW didn't allow TCB retrofit and wouldn't activate a VIN from a car with retrofit on their servers.
So your NBT was installed with the original car vin, did you purchase FSC's from BMW or was the unit activated by a 3rd party?
What was the cost of the TCB? Did you retrofit yourself, could you describe the procedure?
m.fr.gr.