At the Shop Look for a neat, well-organized facility, with vehicles in the parking lot equal in value to your own and modern equipment in the service bays. Professionally run establishments will have a courteous, helpful staff. The service writer should be willing to answer all of your questions. Feel free to ask for the names of a few customers. Ask if the shop customarily handles your vehicle make and model.
Some facilities specialize.
Ask if the shop usually does your type of repair, especially if you need major work. The backbone of any shop is the competence of the technicians. Reward good service with repeat business. It is mutually beneficial to you and the shop owner to establish a relationship. If the service was not all you expected, don't rush to another shop.