Thanks Paul, but I have done a bit of reading and I'm more confused than ever about whats needed to update my Sat Nav.
My 2007 rx 350 is running Version 14 of the Navigation Data dvd. I understand that the new Version 16 is available direct from Sensis Australia for $325 and that it is as easy to install as putting the DVD into the dashboard player and switching to Navigation and uploading the data.
What I'm confused about whether there is a difference between this type of installation and a "software update".
From reading forums on this site and the Australian Lexus form, I understand there may be two processes involved: updating the Navigation Data and updating the system software (???).
Am I correct that there are two processes involved here? One involves getting V16 from Sensis and the other needs a Lexus service centre?
If so, what is involved in getting a sofware update?