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Does each Lexus model use it's own unique NAV DVD? Or, is there only 1 DVD and it's interchangeable between models? For example, would a current RX NAV DVD work on an '06 GS? Thanks.
Thanks guys. Eyekutr has it right in my case. I was comparing an '07 RX NAV disk to a '06 GS NAV disk. So, it would be different generations of NAV systems.