This has never been clarified 100%, i know of stereos that after being moved to another vehicle lose partial functionality after 10 ignition cycles,
@Gingercoastie had this problem with his
Have spoken to a tech who tried this in conjuction with a VW dealer and after disabling component protection they could not regain full functionality of the radio outside the original vehicle but a soon as its connected back in original van works perfectly swap back to new vehicle 10 ignition cycles and things shut down