I am guessing the only thing you can take out would be the antenna. I dont no much about the factory install but i think in the later years of the MCS they had it able to have a SAT option for radio so you could control the sat radio on the MCS, if that is true then the radio code stays with the MCS so you cant transfer the service to your car. My guess is if you wanted factory sat radio the dealer has to do some activation with the computer.