Timing belt repair and many more topics
An assurance of quality is the second reason. Chains hire only licensed and certified mechanics. On top of that, having more mechanics at the shop means having more experience on hand to puzzle out obscure problems, and means it is more likely that you will get the services of someone who specializes in your car's type of problem. The third reason is convenience. An independent mechanic's warranty on his car repair is usually good only at his own shop.