The 33060 navigation unit will indeed work in a US prius. I live in Canada, but my Prius was purchased in the good ol' USA! That unit is a Generation 3 unit where as 47020 unit is a Generation 2. Either will work just fine! However, if I could do it again, I would definitely go with the Generation 3! If you are ever inclinded to attempt the install, let me know, I am more than happy to help you. Dreamer, a PriusChat member, just finished doing it with my help and he is amazed at how much more he loves his car now! I have helped two others on PriusChat do it too. I hated it when people told me it was not possible. Nothing is impossible! I am currently helping a member with a 2007 Prius with a Nav install now. And even now we are blowing apart myths that Priuschat members have been spewing out for the longest time!