Coverage is subject to deductibles, limits, and exclusions. The contract covers repairs only of covered parts and only when they suffer a mechanical breakdown as defined in the contract. Under some circumstances, a mechanical breakdown of a covered part may not be covered. Examples include if the failure is due to misuse, lack of proper maintenance, or when a non-covered part is what caused the covered part to fail. The exclusions contain a list of parts not covered, some of which may be associated with or contained in component groups that are covered. Examples include brake drums, rotors, pads and shoes, thermostats, and the exhaust pipe system. See your service contract for details.