i changed my head unit... keep in mind there are a lot of extras u have to do for an aftermarket head unit... specially with gps/navigation... hardest part is running the "orange" illumination wire from behind the guages to the back of the head unit... then u have to buy and extra adapter for the bose (if you have it) I bought a 4 ohm output converter to the speakers... then i ran some a control wire for the amp... and power and grounded my amp in the trunk... some rockford video wire for my head rest screens and trunk screen... I recommend changing the head unit if you know what your doin. Even though its a good unit it still lacks in a few things... and if you get a head unit with navigation, keep in mind you have to buy another set of wires that taps into your speed wire... for u to recieve data