But installing an aftermarket CarPlay head unit isn't practical for TSX models with navigation since the entertainment stack is integrated into the dash. About a month ago, I came across and had an installer put in a headless CarPlay unit from Naviks that uses the car's 8-inch factory navigation screen as a CarPlay display. CarPlay. A smarter, safer way to use your iPhone in the car, CarPlay takes the things you want to do with your iPhone while driving and puts them on your car’s built-in display. You can get directions, make calls, send and receive messages, and listen to.