no, all connections fit after reviewing a video, however i have a completely extra harness from the install. there are two that are similar. they are a breakout harness for the OEM buttons/passenge sensor on either side of the radio, the one i used has all the connectors connected, there is another one with an extra plug on it, has a thin data=type connector but it has nowhere to go. they both cant connect to the car, its an either-or affair, but im perplexed as to why they sent two sets, unless one is for US and one is ero/jdm. good news is you can change from KM to MPH and C to F on the units of measure. just gotta figure out the AC problem. and yes, i moved over the black control box from the original unit.