If you'd like to install LED auto headlights on your car, you will need to purchase an LED headlamp assembly that is made for your vehicle. If the LED assembly is not produced specifically for the make and model of your vehicle, it may not fit properly. Fortunately, LED headlamp assemblies can be purchased online for practically every vehicle, even older models. Once you have the LED assembly, installing it is the same as installing a regular headlamp assembly.