An aftermarket auto warranty generally does not cover the costs of repairs that are in relation to wear and tear. An aftermarket bumper-to-bumper warranty will cover expenses for repair and replacement of most parts on your car, but usually this warranty will not cover your brakes, tires, etc. However, there are companies out there that will provide you with a warranty that covers wear and tear parts in addition to the other parts. It is smart to purchase a warranty that covers wear and tear parts even if it is more expensive than a regular mechanical warranty. This is because approximately 80% of your car repair expenses are due to wear and tear issues. You can save a good amount of money with anauto warranty that provides coverage for wear and tear problems, especially if you have an older car.