What does SYM mean on car a insurance policy?

The acronym SYM on a car insurance policy means symbol. ISO rating symbols for auto insurance are used to assign values to vehicles based on the car make and model and car safety ratings, among other things. The value of the vehicle and its repair costs as determined by real life loss experiences are also taken into account to assign ratings. The purpose of an ISO rating is to determine the risk to the insurance company to insure the vehicle.