An auto mechanic is a mechanic that works with cars, car parts, and special car changes that make the car work differently called modifications. Auto mechanics can either know all about all the different parts that let the car work, or they can specialize in one specific kind of part or car. People go to auto mechanics for many reasons: They might need to get a new car part, they might need to find out what is wrong with their car, or they might want to add something new to the car to make it better. Auto mechanics almost always work in places called garages, that are made for the work that auto mechanics do.