Automotive mechanics make mechanical repairs and carry out scheduled maintenance on cars, trucks and other motor vehicles using a variety of testing equipment and tools. This process customarily involves the use of computerized diagnostic equipment, such as infrared engine analyzers, spark plug testers and compression gauges. An even greater variety of tools is used to complete the work, including pneumatic wrenches, lathes and grinding machines, jacks and hoists, and electronic service equipment. Besides repairing damaged and defective vehicles, mechanics also conduct routine and scheduled maintenance: balancing and rotating tires, replacing filters, performing oil changes, lubrications and tune-ups, and installing parts such as mufflers, shock absorbers, exhaust pipes, radiators and springs. These repairs and maintenance must be completed to exacting safety standards. 

With all of the complex repair and maintenance machinery used and the new technology built into modern automotive components, knowledge of electronics is increasingly desirable in a mechanic. In fact, the new developments in engines, transmissions and suspension systems, and the increased use of electronic components are changing the mechanic’s job into that of a technician, with more emphasis on vehicle diagnosis. 

Automotive service technicians perform some or all of the following duties: