I've got a 2012 Nissan NV and did my own installation. (van)
You will probably have to use the GPS sensor supplied with the unit.
The workaround posted
http://avic411.com/index.php?/topic/38589-official-avic-nex-bypass-avic-units-only/
works I never attached the parking brake wire.
Plays movies off DVD or SD card while driving.
You can turn off the video instantly by pressing the mode button.
The plug adapter I found
Had no wire on the plug for the purplelish pink wire (Speed sensor)
Speaker wires were all standard. ( had to wire on my new speakers and bass box )
I had to