Review on Koason Android Multimedia Navigation 2007 2014 by Randy Holt

I did the installation on my 2009 BMW X5 35d. Installation was pretty easy and once it was done everything worked fine. about 15 minutes! Then the idrive button doesn't switch between the idrive menu and the android menu anymore, the idrive stick doesn't move anything on the screen, the android screen freezes and the android sound doesn't work anymore! I left and came back 30 minutes later, everything was working as it should again. about 15 minutes! And then the same questions came back. Tried several times, always the same result! It looks like it has a heater issue which is a shame because if it worked as it should it would be a really nice addition/upgrade to my car. I suspect that this head unit is defective.