I see this is an older thread I guess I’m bringing back from the dead. I am a longtime owner of my 2003 GX470, and I JUST NOW found out I can update my navigation. Got under the front passenger seat, popped my DVD out & attached is my disc. My question is, what is the newest navigation disc I can put in my 2003 GX470 that will still be compatible and run smoothly? Are the most up to date versions of the nav discs too advanced for my system? Any input will be helpful before throwing out over $100 or more for something I can’t use.
