bahwrites

I have a Lexus 2002 RX300 and need to update the navigation system. It currently has 2001/version 1. I have the following questions: 1. Do I need to load all updates since 2001 in sequence or can I just load the latest one? 2. I bought part #PT219-GN23W-13 on eBay but it says it should be loaded after 2000/version 1. Can I load it after 2001/version 1? 3. Evidently there is another disk I can buy called a software/service/firmware disc. What is that for? Thank you in advance for your consideration and assistance.

So, is that final update the only one I have to install? Will that one update bring me up to date with the 2013 info? Thanks in advance for your advice.

I recently bought a 2002 RX 300. The nav system has a date of 2001. I would like to update it. Do I need to do every update since then in sequence or can I just get the latest update? Thanks in advance for any advice on this. And, where is the cheapest place to get the CD or CDs.