What you need to look for, typically, are double- SmartCar OBD2 USB Device head units. A double-DIN unit goes in a 7-by-4-inch slot in the dash, which is relatively standard now. It can get pricey, as pro installation is recommended, and can cost from $200 to $600 for parts and labor on top of the head unit.Keep in mind Android Auto doesn't require a head unit. Simply mount your phone or tablet on the dash, and you can skip the fancy hardware and just use the.Click Here