I have a 2008 Tundra it is pre-wired. When I bought it I had the sonar thrown in to the deal. The sonar that they put on it did not use the the wires already on the truck. They told me that the sonar was Toyota parts but I found out from another dealership that they install aftermarket sonars approved by Toyota. It has yet to work right it beeps all the time, the botton is not in the right place and the light on the dash up by the clock does not work. hopefully they will make it right next monday.