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What Is the Best Online Diesel Mechanic School?

Are you looking to learn more about diesel engines or advance your career as a diesel mechanic? Online diesel mechanic schools are a great way to improve your knowledge on your terms. 

While hands-on experience is invaluable in the diesel transportation industry, online diesel mechanic courses can be an excellent investment in your career. So, check out the best online diesel mechanic schools and programs and advance your career today!

Quicklook: Best Online Diesel Mechanic Schools

  • Best For ASE Exam Prep: Penn Foster
  • Best For Career Assistance: Ashworth College 
  • Best For Externship Opportunities: Preppy Trades
  • Best For Continuing Education: Diesel Laptops University
  • Best For Free Diesel Mechanic Course: Alison Learning

5 Best Online Diesel Mechanic Schools

From complete courses to individual classes, the best online diesel mechanic schools can help you gain industry knowledge that you can apply on the job. 

Penn Foster

penn foster

The Penn Foster Diesel Mechanic and Heavy Truck Maintenance online program helps students prepare for a new career as a diesel mechanic at their own pace. In their fully online flexible courses, you can build your knowledge on basic diesel engine operations, troubleshooting, and repair. 

Designed to help students pass the National Institute for Automotive Service Excellence (ASE) Certification Medium-Heavy Truck tests, this course is a great supplement for apprentices that need help with diesel truck theory. 

Best For: ASE Exam Prep

Contact Info: 

Enrollment: 50,000

Acceptance Rate: 100%

Admissions Requirements: Students must have a high school diploma or GED.

Tuition: $1,089 for the program

Program Type: Asynchronous

Overview of Diesel Mechanic Program: The Penn Foster diesel mechanic career diploma course takes 7 to 12 months and can be completed at your own pace. 

Unique Features of School

  •  Specifically prepares students to pass ASE exams
  •  The course includes simulations and 24/7 online resources
  •  Students receive a discount on Snap-on tools needed for the trade

Ashworth College

ashworth college

Ashworth College offers another excellent diesel mechanic course that you can complete at your own pace. With fully interactive online lessons and study materials, you can simulate real-work applications to help prepare for the ASE Medium-Heavy truck tests. Students and graduates also can access the Ashworth College Central Network for ongoing help with resumes and job placement.

Best For: Career Assistance

Contact Info: 

Enrollment: 9,706

Acceptance Rate: 100%

Admissions Requirements: You must be at least 16 years old with a high school diploma or GED.

Tuition: $1,089 for the program

Program Type: Asynchronous

Overview of Diesel Mechanic Program: The Diesel Mechanic career diploma from Ashworth College teaches students the essentials of diesel engine operations and repair while preparing them to pass ASE exams. 

Unique Features of School

  • Pay for school with 0% interest monthly payments
  • Flexible yet interactive classes
  • Career services will continue to provide help after graduation 

Preppy Trades

preppy trades

An excellent alternative to traditional trade schools, Preppy Trades combines 100% online training that you can complete at your own pace combined with an optional Externship for hands-on experience. 

In partnership with Auburn University, you can complete preppy’s Diesel tech program in as little as four months. With no textbooks, classrooms, or schedules, students get a free laptop to complete their studies and can even learn from their mobile phones.

Best For:  Externship Opportunities

Contact Info: 

Enrollment: 27,000 in the Auburn University network

Acceptance Rate: 100%

Admissions Requirements: Students must either have a high school diploma or GED or be actively pursuing one

Tuition: $2,599 for the program

Program Type: Asynchronous 

Overview of Diesel Mechanic Program: The online Diesel Tech program with Preppy Trades offers state-of-the-art learning and externship placement for a comprehensive education. 

Unique Features of School

  • Free laptops for students
  • Externship placement for hands-on experience
  • Offered through an accredited nonprofit university 

Diesel Laptops University

diesel laptops university

Diesel Laptops University offers a wide variety of a-la-carte diesel mechanic courses aimed at developing skills in the automotive and diesel industries. Plus, all of the courses have been developed by ASE-certified professionals.

Some of these classes include multimedia presentations with translations in 50 languages. Take classes on topics such as steering and suspension systems or heavy-duty hydraulics to expand your knowledge in the diesel industry. 

Best For: Continuing Education

Contact Info: 

Enrollment: Over 100,000 learners

Acceptance Rate: 100%

Admissions Requirements: None

Tuition: Most courses are $99 each

Program Type: Asynchronous 

Overview of Diesel Mechanic Program: The diesel mechanic courses from Diesel Laptops University are affordable and specific, so students can pick and choose what classes to take based on what they need to advance their careers.

Unique Features of School

  • A la carte courses are focused and affordable
  • All classes have been developed by real ASE certified technicians
  • Designed for busy mechanics who want to expand their knowledge on their own time 

Alison Learning

alison learning

Wondering if becoming a diesel mechanic is the right career path for you? Alison Learning’s completely free Diesel Engine Cycles, Maintenance & Control course is a great way to learn the basics without any commitment. 

The course typically takes anywhere from three to four hours to complete. Students who earn an 80% or higher on the exam will receive a certificate of completion.

Best For: Free Diesel Mechanic Course

Contact Info: 

Enrollment: 12,000

Acceptance Rate: 100%

Admissions Requirements: None

Tuition: Free

Program Type: Asynchronous

Overview of Diesel Mechanic Program: This free diesel engine course is excellent for anyone interested in becoming a diesel mechanic and who wants to learn more. 

Unique Features of School

  • Free learning
  • Interactive 3D models show students how diesel engines work
  • No-commitment intro course

What Is a Diesel Mechanic?

A diesel mechanic is an essential part of the transportation industry. They specialize in servicing, repairing, and inspecting a wide range of diesel engines, machinery, and vehicles. 

What To Consider With Online Diesel Mechanic Programs

Online courses can be a great way to advance your career as a diesel mechanic, but there are a few things you should keep in mind when choosing a diesel mechanic program. 

Program Material

Some diesel mechanic courses are more general, while others are more specific. Look into what the course covers and how much commitment you’re willing to make to your online education. 

Hands-On Experience

Hands-on experience is essential for a successful career as a diesel mechanic. Whether your online school offers internship opportunities and in-person training or you’re seeking them out on your own, you should be sure to supplement your online course with real-world experience. 

Online Tuition & School Fees

Tuition and fees for online diesel courses vary greatly from free to thousands of dollars. Consider what’s covered by your tuition and fees to find the best value to fit your needs. 

Job Opportunities

Before beginning any continuing education course, it’s important to know what opportunities are available upon completion. Think about how this program will set you apart from other applicants and what knowledge you aim to gain. 

Length of Program

Course lengths can vary depending on the college and program. Consider the amount of time you’re willing to put into your online diesel mechanic course before you start. 

Also, most online diesel mechanic programs are asynchronous, meaning you can complete them at your own pace. However, there are some synchronous and hybrid options, so ensure your course will fit into your schedule. 

Advance Your Career with an Online Diesel Mechanic Course

Whether you’re just starting to consider becoming a diesel mechanic or if you’re a long way into your career, there is a diesel mechanic course for you. From full certification programs to single-topic-based courses, online diesel mechanic training is a great way to advance your career.


What is a diesel mechanic salary?

In the United States, diesel mechanics earn an average of $27.19 per hour.

Are diesels going to be phased out?

Despite the rise in electric vehicles, diesel engines still dominate the transportation industry, and demand for diesel mechanics is expected to grow over the next ten years.

What subjects are needed to become a diesel mechanic?

People with a strong aptitude for mechanical workings who hands-on work can make excellent diesel mechanics.

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