Joe K Posted May 14, 2009 Share Posted May 14, 2009 I have a 2005 Lexus ES330 which came with the version 4.2 generation 4 navigation disc. I'd now like to purchase on ebay an updated disc v7.1 or v8.1. On ebay, they don't always list what generation the update is. How can I tell? What numbers on the disc correspond to the generation? Is there a list somewhere? Thanks for your help. Quote Link to comment Share on other sites More sharing options...
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