A free, peer-reviewed automotive textbook for students and instructors to share.

Simply click on the ASE area in the menu to find a table of contents of all listed topics. If the topic is highlighted, there is a downloadable PDF containing the content.

  • A1 – Engine Repair
  • A2 – Automatic Transmission/Transaxle
  • A3 – Manual Drive Train and Axles
  • A4 – Suspension and Steering
  • A5 – Brakes
  • A6 – Electrical/Electronic Systems
  • A7 – Heater and Air Conditioning
  • A8 – Engine Performance
  • A9 – Light Vehicle Diesel Engines

A list of authors and peer reviewers are indicated in each downloadable PDF. Any questions regarding the content should be directed to

As a bonus, there are a few additional training/educational resources.

ABS/VSA/TCS Virtual Lab Diagnostic Exercise