QUOTE (bikerdawgs @ Dec 11 2008, 06:13 AM)

QUOTE (Step Hen @ Dec 10 2008, 12:48 PM)

Yes, you can remove update the navigation system by removing the original disc, and inserting the new disc. This will update the software on the nav, and then you're set to run off the new map data. The drive is located in the lower right hand side of the trunk.
Alright thanks man. Where and what disc should I buy for it? In other words, what is the newest version of software for it?
2004 RX 330
86271-3303X (on the disc - the higher the last digit the higher the version)
V8.1 is the most current disc available and was released in November of 2008.
You can acquire this GEN23 map disc from a Toyota or Lexus dealership.
Dealers are free to set their own pricing so shop around.