My new harness is hanging in place at the moment, and I haven't screwed in any hangers. Mine is easy so far, but I have the front clip off of the car. You're going to have to remove the passenger side inner fender at a minimum so you can access the hole for where the harness goes into the passenger compartment. John adds some neat features to the harness and he'll go over it with you when you order to determine what you do/don't want. My biggest question at the moment is where do I mount this thing? I can try following the factory harness path, but reusing the factory clips is out since this one comes with brackets that take self tapping screws. It looks like a few screws will have to go into the heater/ac box and I'm worried about screwing into something important.