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An auto mechanic (automotive technician in most of North America, car mechanic in British English and motor mechanic in Australian English) is a mechanic with a variety of automobile makes or either in a specific area or in a specific make of automobile. In repairing cars, their main role is to diagnose the problem accurately and quickly. They often have to quote prices for their customers before commencing work or after partial disassembly for inspection. Their job may involve the repair of a specific part or the replacement of one or more parts as assemblies.
Basic vehicle maintenance is a fundamental part of a mechanic's work in modern industrialized countries while in others they are only consulted when a vehicle is already showing signs of malfunction. Preventative maintenance is also a fundamental part of a mechanic's job, but this is not possible in the case of vehicles that are not regularly maintained by a mechanic. One misunderstood aspect of preventative maintenance is scheduled replacement of various parts, which occurs before failure to avoid far more expensive damage. Because this means that parts are replaced before any problem is observed, many vehicle owners will not understand why the expense is necessary.
With the rapid advancement in technology, the mechanic's job has evolved from purely mechanical, to include electronic technology. Because vehicles today possess complex computer and electronic systems, mechanics need to have a broader base of knowledge than in the past.
Due to the increasingly labyrinthine nature of the technology that is now incorporated into automobiles, most automobile dealerships and independent workshops now provide sophisticated diagnostic computers to each technician, without which they would be unable to diagnose or repair a vehicle.
Automotive mechanics work on cars and light trucks. Their responsibilities include maintaining, inspecting and repairing these vehicles. The majority of mechanics hold associate's degrees or certificates in automotive technology. These programs combine classroom work with real-world experience. Between formal schooling and on-the-job training, it can take up to 5 years to become fully qualified, according to the U.S. Bureau of Labor Statistics (BLS). Additionally, innovations such as hybrid engines and GPS technologies mean that mechanics must update their skills constantly.

Most employers prefer that mechanics become certified through the National Institute for Automotive Service Excellence (ASE), which requires experience and an examination. The ASE offers certification in eight areas.