A used Hyundai warranty can cover all of the same components as those covered by new car warranties, and may have policies that are similar. However, the term or length of the warranty will be somewhat shorter. Extended warranties or service plans will typically cover the vehicle for up to 100,000 miles or ten years, whichever comes first. A used vehicle warranty will cover the time and mileage remaining from time the warranty is purchased, up to the maximum number of years and mileage. A used Hyundai warranty can be purchased from an outside company or from the dealership selling the vehicle.