You can easily add a TOYOTA CD player later. You need a TOYOTA CD or changer and the CD "fitting kit" that includes mounting brackets and a special Y cable.Keeg said:
You can also get kits from Harry and Coastal to adapt a Jensen CD/MP3 player but not necessarily with full touch-screen functionality.
Adding the Toyota integrated NAV is NOT practical or affordable due to the need to install the GPS antenna/receiver under the dash top (est. 6 to 8 hours of labor), installing the special cables, brackets and NAV ECU (snother 8 hours or so) - all bought at REPLACEMENT prics$$$ At one time, we estimated several thousand $$ in parts alone - NO DVD database at those prices either!
Coastal has a NAV add-on but it does NOT integrate with the Prius touch screen.
CD/MP3 CAN be added later.
NAV "can" be IF you don't insist on factory functionality.