Designed to help you install an aftermarket radio into the original dashboard. Dash kits are a popular way to customize the interior of your car. They're made up of several parts that come together to customize your dash board. If your car came with a double DIN head unit, you have a choice of replacing it with a single or double DIN radio. If your vehicle came with a single DIN head unit, then you usually have to replace it with another single DIN head unit. Vehicle Application Reference compatible with TOYOTA 2003-2009 4 Runner Limited Edition 2003-2009 4 Runner Sport Edition with RDS Radio