An extended warranty, sometimes called a service agreement, a service contract, or a maintenance agreement, is a prolonged warranty offered to consumers in addition to the standard warranty on new items. The extended warranty may be offered by the warranty administrator, the retailer or the manufacturer. Extended warranties cost extra and for a percentage of the item's retail price. Occasionally, some extended warranties that are purchased for multiple years state in writing that during the first year, the consumer must still deal with the manufacturer in the occurrence of malfunction. Thus, what is often promoted as a five-year extended guarantee, for example, is actually only a four-year guarantee. Extended warranties have terms and conditions which may not match the original terms and conditions. For example, these may not cover anything other than mechanical failure from normal usage. Exclusions may include commercial use, "acts of God", owner abuse, and malicious destruction. They may also exclude parts that normally wear out such as tires and lubrication on a vehicle. These types of warranties are provided for various products, but automobiles and electronics are common examples. Warranties which are sold through retailers such as Best Buy may include significant commission for the retailer as a result of reverse competition. For instance, an auto warranty from a car dealership may be subcontracted and vehicle repairs may be at a lower rate which could compromise the quality of service. At the time of repair, out-of-pocket expenses may be charged for unexpected services provided outside of the warranty terms or uncovered parts. Overview An extended warranty is coverage for electrical or mechanical breakdown. It may or may not cover peripheral items, wear and tear, damage by computer viruses, re-gassing, normal maintenance, accidental damage, or any consequential loss. Most state insurance regulators have approved the inclusion of normal wear and tear, accidental damage from handling, rental car and towing, power surge and other coverages in addition to the standard coverage for defects in materials and workmanship. The indemnity is to cover the cost of repair and may include replacement if deemed uneconomic to repair. It is important for consumers to read and understand the terms and conditions offered at the point of sale. In retail consumer electronics, extended warranties cost 20% to 30% of the price, and give sales associates up to 15% commission at some retailers. Consumer advocate groups, such as the non-profit Consumers Union, advise