First mod - Pioneer AVH-P4300DVD

Masa

You won't need ANYTHING to install the new unit except wiring harness adapter and antenna adapter which you buy separately.

The unit comes in the box with:
AVH-P4300DVD (unit itself)
Pioneer wiring harness (you splice this to vehicle harness -- I used Scoche)
Remote
Black bezel trim (did not need to use this at all - unit fits flush w/out it)
Mounting scews (you will need to use these as the factory torx screws are a different thread)
Black USB Cable extension (this cable I think was about 4ft (?) but since I decided to mount my iPhone in the center cubby I did not need the extra length and put it aside -- I have seen others route the USB cable into the center console so the plug connector comes out in the arm rest compartment by the cupholder)

Simply pop out the OEM unit and bolt in the new one in it's place - no modifications needed to fit.

I do recommend you pick up a 12v relay and splice the e-brake ground to that so you can access DVD/Nav/App mode while the car is in motion.