I just bought the wiring harness, but instead of going through my Lexus dealer, I called my local Toyota dealer and got the same part number, $41 including tax and had it in one day. it took about an hour to install the harness. My 2008 400h has the tow prep package so the wiring connector was right where it should be. My Curt hitch, model 13530, comes this morning Fedex (got it for $130 delivered off Ebay-unreal deal). I did the whole tow hitch and wiring for $170. Not bad!!!