Goodmorning Guys, This may be a silly question but I want to make sure before I start installing my amplifier. I will like to know If I was to disconnect the negative battery cable on my 2016.5 mazda cx-5 touring with navigation. Will I lose any functionalities such as the anti-theft system, key fob needing to be reprogrammed, a reset code for the factory head unit and finally any possible error codes that may arise in the future? Thank you guys again for all the help and info.