Auto warranty services have many names for different types of coverage. Some aftermarket auto warranty companies offer basic "bumper-to-bumper" coverage, while others have "component coverage" that saves you from paying for repairs to items like your air conditioning unit, heater core, electrical system and transmission. 

For a new vehicle these coverages may seem unnecessary, but when buying a used car this coverage can be very helpful. You can estimate when some of these parts of your car may need servicing based on the mileage. Tell a mechanic the make, model, and mileage of your vehicle and ask what servicing the car could need in the next year. You will learn a great deal about whether auto warranty service is right for you. (Standard maintenance and parts replacement in auto shops is based on mileage and how quickly car parts wear out.) 

Choose your coverage with a little advice from your mechanic and you can save yourself from getting aftermarket auto warranty coverage you may not need.