In most states, auto insurance is required before a vehicle can be driven — whether it's new or used. If you have existing insurance, a used car can be added to your policy, or you can purchase a new policy entirely. Not only is it necessary to drive, but some lenders or dealers may require proof of insurance before selling you a car. Some private sellers, however, may be more lenient.
The cost of auto insurance for used cars can vary based on several factors, such as your car's make and model, age, location and more. To get a good estimate of your premiums, it's always best to get multiple online car insurance quotes.