The only Sirius I have are the DIY units because the vehicles are not equipted by manufacturer. These units are not too hard to install for a slightly tech savy person. The three wires from the head mounting unit can be fed under the interior molding to the connections. An antenna connection box is included so you only have to plug it in and tune to a certain station to listen. The power cable can be spliced into any switched accessable power. The hard part is the Sirius antenna that picks up the signal. The wire has to be fed to the outside of the vehicle and the antenna magnets to the roof.