Credential type: certification examination · verified on the issuer's site September 20, 2026 issuer page

Exam Domains

A General Engine Diagnosis 40%

B Cylinder Head and Valve Train Diagnosis and Repair 13%

C Engine Block Diagnosis and Repair 9%

D Lubrication and Cooling Systems Diagnosis and Repair 18%

E Fuel, Electrical, Ignition, Air Induction and Exhaust Systems Diagnosis and Service 20%

Exam Details

Question TypesMultiple Choice, Composite Vehicle Scenario (L-series)

FormatLinear (computer-based)

Online ProctoringAvailable

ID RequirementsOne government-issued photo ID with full name. Name must match ASE registration exactly.

RenewalRequired -- ASE certifications are valid for 5 years. Recertification is achieved by retaking and passing the current version of the test before the expiration date. No continuing education requirement — recertification is exam-only.

Prerequisites2 years of hands-on working experience as an automotive technician (1 year if graduate of qualifying automotive training program)

Retake Policy30-day waiting period between attempts. Full test fee required for retake. ASE registration fee applies per testing window.

LanguagesEnglish

A1 Engine Repair (A1) Exam Blueprint

Exam Domains

Exam Details

Official Study Resources