Originally Posted by UCrewX5

Hi Justin,

The software version of the nav system is independent of the screen itself. It's all based on the nav drive that is located in the left rear compartment. Based on the year of your X5 there is a 99.99% chance that you have the MkIII drive. The highest OS level you can take that drive at this time is 3-1/63, and any disk that is V22 or higher will take your drive to that release level. See http://www.xoutpost.com/navigation/94...ystem-faq.html for more details.

Jeff