anyone ever installed a factory unit in a 07 3 sedan?I wonder how hard it is?

 

Sat radio is not at all difficult to install. Do not even need any tools, just a good bit of time. You are starting at the radio/glovebox area and basically removing trim panels all the way down passenger side of car, around the back and partways up drivers side in trunk area to make a pathway for installing receiver, antenna, and cable back up to the radio. The included instruction are excellent in describing how to remove panels and route things correctly. You can get a complete installation instruction manual from the dealer parts dept so you even check it out prior to deciding to install.
Don't forget that you will loose the AUX iPod jack usage unless you also get the switching box.