Answer: You should have your vehicle winterized before the weather gets too harsh or the temperature gets too cold. You want to have it done before the bad weather really arrives. If you wait too long, you are putting yourself in danger. Plus, many other people probably waited as well; so, car care centers will be packed with customers, and you will probably have to wait to have your vehicle inspected. Again, this preventive maintenance should be done early to ensure your vehicle is safe to operate during the winter months.