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Hi everyone. My GX470 has nav version 3.1 and I would like to update it as best I can. Do you know what the latest version is and if you can just jump from 3.1 to the current or do you have to update stepwise?
Yes, you can go to the latest version directly. When you put the disc in it will do a system update. Just follow the instructions on the screen.
There was a Lexus site that had what to order, but it's been shut down. You can still see it via the Wayback Machine, and get the part number to order for your model year GX470
The west coast/east coast versions have the same map data (current as of 2013!) but differ only in the POIs stored on the disc.
Frankly, you'll be better off getting a cell phone holder and using online maps, if you usually stay in areas that have cell service (i.e. not West Texas & remote Nevada)
I purchased mine on Fleabay. Which reminds me... The one I purchased came in a set (ie.. Eastern U.S. vs Western U.S.) I only used the western disk and still have the new Eastern one put away.
Oh and I think my current one IS the latest one, although there could very well be an update. I'll have to check... I currently have "v13.1" Which is far from the 3.1 original disk which I put away as well.
The 04-05 GX470 uses the pictures part # to jump to the latest map version of 2015. That was the EOL for those models. 06&07 uses a different disk... and so on. Make absolutely sure you use the correct disk.