Since the wifes '07 didn't have the nav disc in it - I made sure they would get one for us. The version they found for us is 7P and from what I can gather is the most recent version. When I loaded it into her system it took a while to update - but the resuslts are very noticeable. The system runs VERY fast and the maps (for our area anyway) are much more detailed! The dealer wants $ 150 to purchase it retail... now if I could only figure out how to make a backup copy!