Can a navigation system on a 2002 Toyota Prius be activated?

I would like to activate the navigation system in my 2002 Toyota Prius and was wondering if that is possible to do through a dealer or online? Also about how much does the navigation system cost per month? If it is even possible to activate it at this point.Can a navigation system on a 2002 Toyota Prius be activated?All 2001-2003 model year Prius have those buttons on the dashboard, regardless of whether they actually have the navigation system installed. If you have the navigation system, then the buttons work; otherwise, they don't (you get a message that says something like "external system not connected"). The navigation system was about a $2100 option on those cars, and you're missing several components: The DVD unit under the right front seat, a cabling harness, and the GPS antenna buried inside the dashboard. Equipping your car is possible, but enormously expensive due to the large amount of labor involved in ripping-apart nearly everything inside the dashboard to position the GPS antenna correctly (and then putting it all back together again). You'll be dollars ahead by just buying an aftermarket navigation system for a tiny fraction of the price and sticking it onto your windshield.