I have a 2014 Cx5 that has the factory bose sound system. Before I bought the car someone installed a pioneer aftermarket head unit, I am trying to convert it back to factory. I found a factory unit on eBay (exact same part #) and installed it. Now everything works but the audio. Nav, Bluetooth, satellite radio, cd, backup camera seems to be all working fine. Is there something I could have missed when uninstalling the aftermarket unit and installing the factory unit that caused the audio to not work?