There is always the risk of the dealership claiming that an aftermarket mod will void your warranty. I believe that the mod has to be directly related to the installation. I don't see how adding a hitch would affect the powertrain or the electrical system but I suppose anything is possible. This issue keeps coming up. I think it is time to start a thread as to how many users have actually run across this problem. Could be an urban myth. I agree with Ammoduc completely. Add what you want and enjoy your ride!