Thank- you in advance for your answers with the disclaimer that I know nothing about messing with cars - I found an awesome 2012 Prius for my teenager, one owner perfectly maintained and one little dent that is the first of many to come etc. Only downside is no back- up camera which I feel strongly about. I found threads on after market systems but I am wondering if I can get a back- up camera and Apple play with nav? Does it just replace the display currently there? If so- where do I find one and where would I go to get it installed? Th la in advance for what may be a really dumb question - my daughter really wanted a Prius and this one is perfect for her abuse minus the back up camera and modern niceties.