Mechanical Breakdown Protection is provided by insurance companies, so it has a few similarities with your auto insurance. For example, if the insurance company believes that they are at a high risk of insuring you, then they will increase the premium. Factors such as high mileage will increase the cost of your Mechanical Breakdown Protection, and most policies require the owner to pay the first $100 to $200 of a repair. Meanwhile, an extended warranty is available on cars of any age. It might work out cheaper for a high mileage car owner to get a warranty. However, be sure to read the small print of both options before signing anything.