The ASE A5 Brakes test has 45 scored questions in four content areas, plus 10 unscored questions, and you get 75 minutes for all 55. Hydraulic, power assist and parking brake systems is the biggest area at 19 questions (42.2%). Disc brakes follow with 11 questions (24.4%), then electronic brake controls (ABS, traction control and stability control) with 10 questions (22.2%), and drum brakes with 5 questions (11.1%). Every question ties back to one or more tasks in ASE's published task list, so the task list is your checklist. Questions are four-option multiple choice, including Technician A / Technician B items, symptom-to-cause items, "the technician should" items, and items built on a pictured measuring setup, such as a rotor runout check. A pass plus documented work experience certifies you for 5 years, and A5 is one of the eight tests for Master Automobile Technician.
01The test specification
The ASE test specification for ASE A5 Brakes splits the 45 scored questions across four content areas. ASE adds 10 unscored questions for research, and you have 75 minutes for all of them. Each area links to five free questions.
| Area | Content area | Scored questions |
|---|---|---|
| A | Hydraulic, Power Assist, and Parking Brake Systems Diagnosis and Repair | 19 (42.2%) |
| B | Drum Brake Diagnosis and Repair | 5 (11.1%) |
| C | Disc Brake Diagnosis and Repair | 11 (24.4%) |
| D | Electronic Brake Control Systems: Antilock Brake System (ABS), Traction Control System (TCS), and Electronic Stability Control System (ESC) Diagnosis and Repair | 10 (22.2%) |
| Total | 45 |
02What is the ASE A5 Brakes test?
The ASE A5 Brakes test is one of ASE's certification tests for cars and light trucks. It covers the whole brake system on cars and light trucks: the hydraulic system and its valves, power assist units, parking brakes (electronic ones included), drum and disc brakes, wheel bearings, and the electronic controls behind ABS, traction control and stability control.
It has 45 scored questions and 10 unscored ones, 55 in all, and you get 75 minutes. Every question is multiple choice with four options, (A) to (D). The unscored questions are there so ASE can gather statistics for future tests, and you cannot tell which ones they are, so treat every question as if it counts.
Passing is one half of certification. ASE also asks you to document relevant work experience, and its study guide says suitable vocational training can be credited toward it; the details are at workexp.ase.com. The study guide does not publish a passing score. Once certified, you hold the certification for 5 years, and you renew it with a shorter recertification test, which for A5 is 23 questions in 30 minutes.
A5 is one of the eight tests, A1 to A8, that ASE lists for recognition as a Master Automobile Technician. The full picture is in how Master Technician status works.
03What does each content area cover?
Area A: Hydraulic, Power Assist, and Parking Brake Systems Diagnosis and Repair (19 questions)
This area has 29 tasks in six groups, which is why it carries the most questions. The master cylinder group covers pedal complaints the master cylinder can cause (poor stopping, dragging, a high, low, hard or spongy pedal), pushrod length, external leaks, and bench bleeding on replacement. Lines and hoses covers inspection for damage and leaks, correct routing and support, and making new lines with double flares or ISO flares. Valves and switches covers metering, proportioning, pressure differential and combination valves, load-sensing proportioning valves, warning lamps, and the stop lamp or pedal position switch.
The bleeding group covers fluid-related faults, the four ways to bleed or flush (manual, pressure, vacuum, gravity), pressure testing, and choosing, storing and handling brake fluid, silicone fluid included. Power assist covers pedal linkage, pedal travel with the engine off and running, the vacuum supply (manifold or an auxiliary pump), the booster and its check valve, hydro-boost, and electronic brake servos or pedal simulators. The parking brake group covers cables and electronic parking brakes, adjustment, the indicator circuit, and retracting and adjusting calipers with an integrated parking brake.
Area B: Drum Brake Diagnosis and Repair (5 questions)
Twelve tasks cover drum brakes. You diagnose hydraulic and mechanical faults (pulling, grabbing, dragging, noise, pulsation, pedal travel), measure drums and decide whether to machine or replace them, machine them to spec, and take apart, clean and inspect shoes and hardware using proper safety procedures. Then you lubricate the backing plate pads and adjusters, service wheel cylinders, install shoes, preset the shoes and parking brake before the drum goes on, and make final checks. Wheel bearing noise and service are part of this area too.
Area C: Disc Brake Diagnosis and Repair (11 questions)
Sixteen tasks cover disc brakes. Diagnosis splits into hydraulic and mechanical causes, then the job runs in order: retracting pistons, removing and inspecting the caliper, checking slides, pins and threads, inspecting pads and hardware, and deciding whether to rebuild or replace the caliper. Rotors are measured with a dial indicator and a micrometer to decide on indexing, machining or replacement, and machined on or off the car. The list ends with installing and lubricating parts, torquing wheels, burnishing new pads on a road test, wheel bearings, and telling a brake vibration from a tire or wheel vibration.
Area D: Electronic Brake Control Systems: Antilock Brake System (ABS), Traction Control System (TCS), and Electronic Stability Control System (ESC) Diagnosis and Repair (10 questions)
Eleven tasks cover ABS, traction control and stability control. You follow the maker's safety precautions, diagnose complaints such as longer stopping, wheel lock-up, false activation, odd pedal feel or pulsation and noise, and watch the warning lamps at start-up and on a road test. Diagnosis uses the scan tool, multimeter and oscilloscope, with or without codes. Service tasks include bleeding the electronic hydraulic unit, replacing components and initializing modules, and testing wheel speed, yaw, steering angle and pedal position sensors. The list also covers problems caused by vehicle modifications such as tire size or ride height changes, wiring repair, faults that come from related systems such as collision mitigation, and clearing codes to confirm the repair.
04What kind of questions are on it?
ASE's A5 study guide has ten sample questions. Two show a measuring setup and ask what it checks or what an out-of-spec result would cause, so know what a dial indicator on a rotor measures and what lateral runout does at the pedal.
Several start from a pedal or braking complaint: a pedal that sinks slowly, one front brake that grabs, a vibration under braking, drum brakes that drag more after each stop. Others ask what the technician should do, such as when a rotor ends up just under minimum thickness after machining, or which repair is correct for a leaking hydraulic brake line. For those, the answer is the maker's procedure, not a shortcut that might work.
Two samples are Technician A / Technician B items: one about uneven pad wear on a floating caliper, and one about the pedal moving when the engine starts with the brakes applied. In both, the correct answer was neither, which is a reminder that each statement must be judged on its own. See how to answer Technician A / B questions.
Reading traps
The A5 samples have no EXCEPT question, but ASE uses the format elsewhere and flags it with a warning line. On brake questions, decide first whether the cause is hydraulic or mechanical. The task list makes that split in both the drum and disc areas, and it lists noise, grabbing and pedal pulsation only under the mechanical tasks.
05Where should your study time go?
Area A is 19 of the 45 scored questions (42.2%). With disc brakes, areas A and C are 30 of 45 (66.7%), and adding the electronic controls in area D brings it to 40 of 45 (88.9%). Drum brakes, at 5 questions (11.1%), need less time, though the hydraulic principles carry over from area A.
Area A is broad: 29 tasks in six groups. Give each group a session: master cylinder, lines and hoses, valves and switches, bleeding and fluid, power assist, parking brake. Area D has 11 tasks for 10 questions, almost one question per task, so give every ABS, traction and stability task some study time.
Use the task list as a checklist and mark each task you could explain. ASE says every question represents one or more tasks. Pace: 55 questions in 75 minutes is about 1 minute 22 seconds each.
06Registering, retesting and recertifying
You register and pay through ase.com. ASE charges a $34 registration fee per order plus $62 for each test, so A5 on its own comes to $96. Each extra test in the same order adds $62, not another $96. ASE sets the registration and scheduling dates, so check ase.com for the current dates and fees before you book. The full breakdown is in ASE test fees and registration.
The test is delivered on screen. ASE offers a free demo of its testing platform at ase.com/free-test-drive, and the study guide notes two language aids: a Leer en español button that shows each question and its options side by side in Spanish and English, with no separate registration, and a Spanish/English pop-up glossary available during all ASE tests. More on the format: how ASE tests work.
If you do not pass, ASE makes you wait 30 days before you can take the test again. Use the month on area A first, since it carries the most questions, then on area C.
After you pass, the certification runs for 5 years. To renew it you take the A5 recertification test, 23 questions in 30 minutes; you are eligible for it only after passing the full certification test once.
07Questions people ask
- How many questions are on the ASE A5 Brakes test?
- 55 questions in 75 minutes: 45 scored and 10 unscored. ASE uses the 10 unscored questions to gather statistics for future tests, and you cannot tell which ones they are, so answer all 55.
- What is the biggest content area on ASE A5?
- Hydraulic, Power Assist, and Parking Brake Systems Diagnosis and Repair, with 19 of the 45 scored questions (42.2%). Disc brakes have 11, electronic brake controls (ABS, TCS and ESC) 10, and drum brakes 5.
- What score do you need to pass ASE A5?
- ASE's study guide does not publish a passing score for A5. It publishes the content areas, the question counts and the task list. Check ase.com for how results are reported.
- How long does ASE A5 certification last?
- 5 years. To renew it you take the A5 recertification test, 23 questions in 30 minutes, which you can take only after passing the full A5 certification test once.
- How much does the ASE A5 test cost?
- ASE charges $62 per test plus a $34 registration fee per order, so A5 on its own is $96. A second test in the same order adds $62. Check ase.com before you book, since fees can change.
- Is ToolboxPrep affiliated with ASE?
- ToolboxPrep is an independent study site. It is not affiliated with or endorsed by ASE (the National Institute for Automotive Service Excellence). Our questions are original practice questions written to the published ASE test specifications; they are not actual test questions.
08Sources
- ASE Automobile Study Guide (Tests A1 to A9), 2026: the A5 test specification, question counts, testing time, the task list this page paraphrases, and the sample-question formats
- ASE (ase.com): the $34 registration fee per order, the $62 fee per test, the 5-year certification period and the 30-day retest wait
The content areas and question counts were checked against ASE's published study guide on October 11, 2026, and the task descriptions paraphrase its task list. ASE's study guide is the final word. If you find one of ours out of date, tell us.
Related: free practice questions · ten free A5 questions · how to answer Technician A / B questions · How ASE tests work
09Practice for this test
ToolboxPrep A5 practice tests are weighted to the specification above, area by area, and every answer is explained, all four options. You can try five sample questions with no account.
Ten free questions per test, no account: free practice questions. How our questions are written and checked: how our questions are made.
ToolboxPrep is an independent study site. It is not affiliated with or endorsed by ASE (the National Institute for Automotive Service Excellence). Our questions are original practice questions written to the published ASE test specifications; they are not actual test questions.