Upgrade to NAV

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So i just upgraded my truck to the 2012 Pathfinder LE 4.0 for the 4WD capabilities after a 5inch calmini lift. However, i need and want to upgrade my stock audio to the full stock navigation. Can anyone tell me what i need to purchase or if this is possible? I have the 7" screen with backup camera already, but i see my main controls need to be swapped out and the steering wheel left controls also. Not sure what all I have under the dash, but hoping the wiring is in place and all i need to do is purchase parts and plug n play. Any help greatly appreciated!!

or is there a aftermarket system where I won't lose my main and steering controls??

Kevin

[legertas]

http://www.ebay.com/itm/251626527045?ss ... 1558.l2649 I do this things