Purchase a plastic toy of a dragon, dinosaur or other fierce beast. Make sure its mouth is open showing lots of wicked teeth.
You may want to charge it first, by holding it in your hand, visualizing it fiercely protecting your vehicle from accidents, theft and vandalizing. Say an appropriate invocation to your god or goddess if applicable (for instance, if you are using a cat or lion toy, you may want to invoke Bast). If you hang this in your windshield, it will fiercely protect your vehicle.
To make a charm to protect you as you drive, place the following items in a small box: three holly leaves, one clove of garlic, one sprig of cedar, one piece of clear quartz, and one piece of dragon's blood resin.
Hold the box shut, and imagine you are driving your car. Envision yourself working in a clear, keen, and observant state. You make decisions as necessary when you are behind the wheel; you react with split-second timing, and you generally find joy in your role as a safe driver.
Put the box in the glove compartment of your car and follow through by always driving in a safe and responsible manner.