I've seen posts around here about Nav CD upgrades and things like, I'm wondering if they are just updated maps for the Nav system and bug fixes? Do you have to get them through a dealer? Thanks.

 

these updates are for new streets around your area and most important updated point of interest such as restaurants, gas station, things like that around the country. the website is acuranavi.com heres the link, good luck. and also dont go to the dealer because they order the cd from here aswell but charge you a lot more on top of the regular $185 price.

http://www.navigation.com/is-bin/INT.../Default-Start