 After purchasing my 05 prius with factory navigation and HID headlights, package 6 I believe. Just be aware that all 04 and 05 had the ugly painted door panels and dash, I strongly would avoid these if you can get the 06 and newer. the paint has peeled off on these parts. I went to a prius dismantler and purchased all the door panels and dash parts from a 08 prius to do the swap, so much nicer. The second and biggest issue is the HID headlight bulbs, they just shut off while you use them . The best solution is replace them with aftermarket HID bulbs, do not use the factory Toyota bulbs, they will go out again. Numerous owners have had this issue, ballast is not the problem, it's the bulbs.