As long as you are familiar with the electrical system of your car, you do not need to hire a professional to install a car alarm. You may also need to have the knowledge of using a wrench for a quick and smooth installation. Some units feature a detailed installation guide. This guides you throughout the installation. But, if you are not comfortable doing it on your own or you simply do not understand the electrical units of a car, then we recommend you get the alarm installed by a professional.