Guide · Updated 2026-10-29

What’s on the Michigan brakes test

Brakes and Braking Systems (automobile and light truck) is one of the most common Michigan mechanic tests. This is what the state’s published outline says it covers.

Topics and weights

Official topic	Weight
System diagnosis and repair Hydraulic valves Brake pedal pulsation Brake performance Wheel bearings Power assist systems Fundamental procedures Noise diagnosis	26%
Hydraulics diagnosis and repair Fluid diagnosis Line repair Hydraulic repair Brake pedal feel Brake bleeding Leak diagnosis	23%
Electronic brake system diagnosis and repair ABS pump / motor operation Safety precautions Speed sensors Braking electrical diagnosis Stability control systems	26%
Drum brake diagnosis and repair Measuring and refinishing Drum / shoe types Brake adjustment Leak diagnosis Parking brake Brake hardware	12%
Disc brake diagnosis and repair Measuring and refinishing Caliper replacement Parking brake Brake hardware	12%

Source: SOS Mechanic Testing Categories Overview (PDF). Weights are shown as published.

How to study it

Start with the heavy sections. System diagnosis and electronic brake systems (ABS, traction and stability control) together are about half the weight.
Practice diagnosis, not just definitions. Most outline sections are titled “diagnosis and repair,” and subtopics include brake pedal pulsation, pedal feel, noise, and leak diagnosis.
Know the hydraulics. The outline lists fluid diagnosis, hydraulic valves, line repair, and brake bleeding.
Use your result letter. If you don’t pass, the letter breaks down your score by subcategory, so you know exactly what to review.

Recertification

Brakes certification must be renewed every five years by passing the latest state test, showing current ASE certification, or completing a state-approved training program. See the recertification guide.

Try 15 free brakes questions Brakes test page

Our questions are original practice items, not actual exam questions. Sources: SOS outline · SOS Mechanics page · SOS FAQ.

FAQ

How many questions are on the Michigan brakes test?

The SOS says most mechanic tests have 55 questions, and a few have 65 to 100. The test ends early (“quick pass”) once you reach the minimum passing score.

Does the brakes certification expire?

Brakes and Braking Systems is one of three automobile/light truck categories that must be recertified every five years. The SOS schedule lists 2025, then 2030, 2035, and 2040.

MI Trade Prep is an independent study tool, not affiliated with the Michigan Department of State.