Factory tints are only found on the rear windows of SUVs, minivans and trucks and oftentimes the front windows as well, whereas aftermarket tints are found on both sedans and SUVs but it can go both ways. However, in order to determine which automobile has an aftermarket tint, one can simply just feel the edges of the windows and if there are seams felt on the edges then it has aftermarket tint. And if there are none, then it most likely a factory tint since it is a pigment embedded on the inside of the window.