Originally Posted by larrymcj

DISREGARD...SEE NOTE AT BOTTOM

Nav version clarification: For anyone out there with a new 2013 (any model...RX, GS, LS, etc.) I have just confirmed with the dealership, who was on the phone with Lexus that the following version is the very latest version and equivalent to 12.1. Version 12.1 is what your system will display "ONLY" if it had an older version installed and you upgraded to the latest. The following is the very same thing. He also found out the reason the date is back in June is because that was when the software was finished and released to the vehicle manufacturing plants...but it never made it to the dealerships until a few weeks ago (as version 12.1).

If your system displays the following...you have the very latest in a new 2013:

Version: 21-12-27
Date: 12-06-01

Hope this helps anyone who, like me, thought they had an earlier version.

NOTE: Lexus just called me to advise the version of software in my new 2013 RX is, in fact, 11.1. They further noted the software for the RX models (and a couple of others) will not be available until January 2013. So, 12.1 can not be installed yet on the RX