What Are Certified Mechanics?

By Rick Popely, Cars.com

Mechanics who pass written tests in specific areas of auto repair, such as engine performance, heating and air conditioning, and brakes, earn certification from the National Institute for Automotive Service Excellence.

The ASE offers certification in repairs ranging from cars all the way through heavy-duty trucks and other categories. For cars and light trucks, ASE tests in nine areas, and mechanics must pass in at least eight areas to become a certified master mechanic (the ninth test, for diesel engines, isn't required).

ASE says more than 232,000 mechanics have been certified in specific car and light truck repairs, and that more than 76,000 are master automobile technicians. Before mechanics can take any ASE test, they need two years of relevant experience. Once they are certified, they have to be retested every five years to retain that certification, and the tests are updated to cover new technology.

The value of ASE certification remains a subject of considerable debate within the repair industry. A significant number of mechanics argue that the ASE's written tests only measure basic knowledge and theory, not the ability to solve problems on the job.

Many dealerships and repair facilities encourage or require mechanics to get certified. Cynics say that is mainly so they can display the "shingles" for customers to see and tout the certifications in their advertising. New-vehicle dealerships train their mechanics specifically to work on their brand's vehicles in manufacturer-sponsored programs, and that training may be more valuable than ASE tests.

Proponents of ASE certification say it assesses how well mechanics understand the principles of diagnosis and repair in specific areas so that they aren't just throwing possible solutions at problems in hopes one will stick. In addition, ASE certification can help mechanics find jobs, receive promotions and earn more money.

ASE certification can make consumers feel more confident about the work their vehicles receive because it indicates the repair shop and its employees value education and training.

A 2006 Virginia Polytechnic Institute study concluded that ASE-certified mechanics do better work. The study said certified technicians received fewer complaints from customers and get higher average performance ratings from their supervisors.