hhedrick

I am currently looking for a new OEM navigation system for a 2004 Lexus GX470. Mine is no longer working. I have been told that I can actually get a newer system than the one I had before...2004. So I am looking for a newer model navigation system anything above 2004 anyone know where I could find one....and is this infact true that I could install a newer model allowing me more options that my 2004 system had?

Does the update change the way the navigation system looks, or does it simply update the maps?