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  • simpilot1 05/22/08 5:53 am PST

    Your 2003 RX is probably generation 3 but to be sure I'd email this eBay seller with your question. I'm fairly certain they can give you a definite answer. Just click on ask seller a question.

    Source: http://cgi.ebay.com/ebaymotors/Lexus-Ge
    n...

  • tizhmslf 11/24/09 3:34 pm PST

    I had the same question regarding my 2005 es330 gps. I just called the dealer parts department and was told i'd need ver. 9.1 at a cost of $199.00.

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