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Engine Repair Certification Test (ASE A1)
The ASE A1 Engine Repair certification test is the Automobile/Light Truck series certification exam for engine-repair technicians: a 55-question (45 scored, 10 unscored research) multiple-choice computer-based test with 75 minutes allowed, taken in English or Spanish at Prometric test centers (remote testing available only for the separate A1R recertification test), for a USD 62 test fee plus a USD 34 per-order registration fee.
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Questions55 total questions, 45 scored (10 unscored research questions not counted for score); the A1R recertification test has 23 scored questions and no research questions
Testing time75 minutes for the A1 certification test; 30 minutes for the A1R recertification test
ScoringPass/fail outcome based on the number of correct answers; ASE publishes no numeric passing score or score scale
Exam feeUSD 62 General Test fee per certification test, plus a USD 34 registration fee per order (sales tax collected in most listed states); the A1R recertification test is also USD 62 (General row of the Recertification Tests table)
Prep options
Study resources for ASE A1
Independent prep
Courses and study resources
Exam overview
What to know before choosing your prep
- Who runs it
- ASE
- Category
- Automotive Service
- Current version
- A1; current specification with no public version label — defined by the Official ASE Automobile Study Guide (© ASE 2026) test specifications and task list for Engine Repair (Test A1)
- Where it applies
- International / multi-country
- Exam languages
- English, Spanish
- Testing provider
- Prometric (test centers and ProProctor remote delivery)
- Format
- Computer-based, multiple-choice (every question has one correct answer and three wrong answers); initial A1 certification taken at a Prometric test center — online remote testing via Prometric ProProctor is available only for recertification tests (and first-time G1)
- Availability
- Year-round by appointment at nearly 500 secure, proctored test centers with wide availability of appointment times; a purchased test must be scheduled and taken within 90 days of purchase, and registration is offered in seasonal windows (Winter, Spring, Summer, Fall)
- Results
- Detailed score report emailed after the appointment finishes; results viewable and printable in myASE within 24 hours in most cases
- Credential validity
- Certification credential is valid for five years; recertification (A1R test or ASE Renewal App) is required to retain the credential
- Remote testing
- Not available
Exam structure
One 55-question (45 scored) multiple-choice test across five content areas per the ASE test specifications: General Engine Diagnosis (18 questions), Cylinder Head and Valve Train Diagnosis and Repair (6), Engine Block Diagnosis and Repair (4), Lubrication and Cooling Systems Diagnosis and Repair (8), and Fuel, Electrical, Ignition, Air Induction and Exhaust Systems Diagnosis and Service (9)
Where rules vary
ASE certification testing is offered in the United States, U.S. territories, and Canada; U.S. military personnel can additionally take tests on certain overseas bases
Eligibility
No prerequisite to sit the A1 test (certification tests may be taken before documenting experience); to become certified, candidates must pass and document 2 years full-time hands-on Repair Technician work experience (up to half may be met by vocational training)
Retake policy
After failing, wait 30 full days before purchasing and scheduling the same test again (full test and registration fees apply again)