gkayvee Posted January 31, 2010 Share Posted January 31, 2010 I'm finally going to update the NAV in my '05 SC430, from version 3.Duh up to 8.1. I'm too cheap to spend $200 at the dealer for 9.1, so I'm on the lookout for a GEN 4 Ver8.1 online. Anyway it appears that the U-code on the disk identifies which GEN the disk is, yes? Can someone take a minute and explain the Version/GEN Code mystery to me? If this has been alrready been discussed to death, a link, please? U23 = GEN4/Ver8.1? Thanks... Quote Link to comment Share on other sites More sharing options...
1990LS400 Posted January 31, 2010 Share Posted January 31, 2010 Here is a website that may help: http://www.lexusnavigation.com The 2005-2009 SC430 is a generation 4 nav system -- bummer that the version 9.1 update for gen 4 nav systems doesn't automatically bypass the "I agree" screen like it does on the generation 5-up systems. You might find an online seller who will discount the $199 price of version 9.1. Sewell Lexus in Texas usually knocks a few dollars off parts and others might also. Edit: The gen 4 discs I see on eBay have W41 on them. The gen 5 discs I see have U31. I see what you mean ... even the eBay sellers seem unsure of what they are selling. Quote Link to comment Share on other sites More sharing options...
gabep Posted January 31, 2010 Share Posted January 31, 2010 There was a guy on this forum that was selling Gen. 4 ver. 9 for a while. You might tyry a search. Don't recall the header. Quote Link to comment Share on other sites More sharing options...
grognon Posted June 28, 2010 Share Posted June 28, 2010 If you want info on Gen 5 ver 9.1 update let me know: legrognon@hotmail.com I might help you. Quote Link to comment Share on other sites More sharing options...
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