i just ordered the scosche kit with a pioneer avh-x4500bt double din. i know i need a particular harness to keep some features..but is the harness a must just to install the stereo? Not worried about keeping any features
Yes if you ever want to revert back to stock. The kit comes with a harness (or should) that will allow you to plug everything back up to the stock head unit if you ever decide to remove your aftermarket head unit.