Online Diploma in Diesel Mechanics

Learn more about obtaining an online diploma in diesel mechanics. Find information on courses, certification, job outlook, and salary. Find an online mechanic school and begin your as a diesel mechanic.

Program Overview

The curriculum within an online diploma in diesel mechanics may take about 6 months to complete. Students enrolled in diesel mechanic programs may gain the training and knowledge needed to maintain and repair diesel-powered equipment. Students may learn how to operate basic diesel engines and computerized truck management systems. Students may also gain technical knowledge needed for repairs and also learn how to troubleshoot complex engine issues. Coursework may deal with diesel engines, fuel-injection systems, hydraulics, suspension systems, and electronics. Popular diesel mechanics courses may include the following:

  • Hydromechanical Diesel Fuel Injection Systems
  • Automatic Transmission
  • Diesel Truck Mechanics
  • Computerized Truck and Bus Systems Management
  • Truck Electricity and Electronics
  • Ignition and Computer Systems
  • Truck Suspension Systems


Although certification is not required, diesel mechanics may who opt for certification through the National Institute for Automotive Service Excellence (ASE). ASE is the recognized industry credential for diesel technicians and mechanics. Diesel mechanics may obtain certification in specific areas, such as preventative maintenance and inspection, electronic systems, and drive trains. Mechanics must have at least two years’ work-related experience and pass one or more of the exams provided by ASE to become certified. To remain ASE certified, diesel mechanics must complete and pass the test once every five years.

Job Outlook & Salary

According to the Bureau of Labor Statistics (BLS), employment opportunities for those pursuing careers as diesel service technicians and mechanics are expected to increase by 15% from 2010-2020.* This expected increase in employment is partly due to the increase in freight shipping, which requires diesel-powered trucks. Additionally, more diesel mechanics and technicians may be required to retrofit and modernize older diesel-run vehicles in order to comply with new environmental regulations. The BLS reports that the median annual salary of diesel service technicians and mechanics is $40,850 as of May 2010. The median hourly wage in 2010 for diesel mechanics is $19.44. Diesel mechanics may also receive commission, especially if they work in truck repair shops and for fleet dealers.

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  • BS in Aeronautics