Applicant will identify mechanical problems, often by using computerized diagnostic equipment. Test parts and systems to ensure that they are working properly. Follow checklists to ensure that all critical parts are examined. Perform basic care and maintenance, including changing oil, giving tune ups, checking fluid levels, and rotating tires. Repair or replace worn parts, such as brake pads and wheel bearings. Disassemble and reassemble parts. Use testing equipment to ensure that repairs and maintenance are effective. Explain to clients their automotive problems and the repairs done on their vehicle.