Hi, I just bought a used 2014 Infiniti Q50 from a repo auction. The car was missing the navigation SD card, maybe the previous owner took it or something. So I bought a new SD card from a local authorized Infiniti dealer. I popped the SD card in, and its asking me for a license key. I asked the Infiniti dealer what it was, and they were unaware. They charged me $125 for 1 hour of tech support to figure it out; which I agreed to. After they inspected everything, they told me I need a new navigation unit, and it will cost me $5300. I refuse to believe that. There has to be a license key available. Its not like the screen goes blank for them to assume I need a whole new navigation unit. Any advice or feedback would be greatly appreciated. Thank you.