When one asks you about auto maintenance repair, you might answer if you have no idea, “Am I a mechanic?” In the subject of auto maintenance, the main practitioner and person of authority is the mechanic. Basic auto maintenance as well as auto maintenance repair are fundamental to a mechanic’s work. Mechanics are the doctors of vehicles; they take care of the illnesses of automobiles, be it a simple flat tire or a severed timing belt. One area of auto maintenance repair is preventative maintenance, another of the functions performed by mechanics. Preventative maintenance lies in the principle that all parts of an automobile have life spans, some parts have shorter ones compared to the others. Those who have shorter life spans are immediately replaced even while still working, to prevent instances of breakdowns where a mechanic is unavailable.