In certain folklore traditions, a goat head is associated with the devil, dark magic, or occult practices. It's believed that leaving the goat head on the car might be a way to invoke fear, protect a property, or place a spell or curse on the vehicle or its owner.
It's important to note that the meaning of the goat head symbol can vary depending on the cultural context and individual beliefs. If you find a goat head on the hood of your car, it's best to consult a cultural advisor, spiritual leader, or someone knowledgeable about local customs to better understand the significance and take appropriate measures based on your belief system.