- ASE G1 is a 65-question test (55 scored, 10 unscored) with 90 minutes allowed, delivered through Prometric.
- Suspension and Steering (24%) and Brakes (20%) together make up nearly half the exam content.
- Fee is $62 plus a $34 registration fee, or $96 total if G1 is the only test ordered.
- Certification requires passing the test plus one year of hands-on experience, though you can test before finishing that experience.
What ASE G1 Actually Is
ASE G1, formally known as ASE G1 Auto Maintenance and Light Repair, is a certification test governed by the National Institute for Automotive Service Excellence and administered through Prometric testing centers. It's designed to validate that a technician understands the core systems found on most passenger vehicles and light trucks - not the deep specialization of a master technician, but the broad, working knowledge needed to safely perform routine maintenance and basic diagnostic and repair work.
If you're just getting oriented, our companion piece on the ASE G1 Certification walks through the credential from a bird's-eye view, while this article focuses specifically on defining what the test covers and how it's structured.
Who G1 Is Built For
ASE G1 is aimed at technicians working in general service, quick-lube operations, tire and brake shops, and dealership service departments who handle maintenance and light repair rather than heavy diagnostic or engine rebuild work. It's a common target for people early in an automotive career, as well as service advisors and parts specialists who want to demonstrate technical literacy without pursuing a full specialty certification track.
Employers hiring for these roles frequently list ASE G1 as preferred or required. If you're weighing whether the credential fits your career goals, the analysis in Is the ASE G1 Certification Worth It? Complete ROI Analysis 2026 and the role-by-role breakdown in ASE G1 Jobs both dig into where this certification actually opens doors.
Exam Format and Question Style
The current official G1 exam consists of 65 total questions: 55 that count toward your score and 10 unscored research questions used by ASE to evaluate future test items. You won't know which questions are which, so every question needs to be treated as if it counts. Candidates get 90 minutes to complete the full set.
Questions are multiple-choice and typically presented as scenario-based prompts - a customer complaint, a symptom, or a diagnostic reading - followed by four answer options. Some questions use the classic "Technician A says... Technician B says..." format common across ASE tests, which requires you to evaluate two competing statements rather than just recall a fact.
The exam is offered in both English and Spanish, giving candidates flexibility depending on their preferred language for technical terminology.
Key Takeaway
Because 90 minutes covers 65 questions, you have roughly 80 seconds per question on average. Practicing under timed conditions before test day matters as much as knowing the content.
The Seven Content Areas
ASE G1 is broken into seven domains, and they are not weighted evenly. Two areas - Suspension and Steering, and Brakes - make up nearly half of the entire exam, so your study time should reflect that reality rather than being spread evenly across all seven topics.
Domain 4: Suspension and Steering (24%)
The single largest content area. Candidates need to understand suspension components, steering linkage, alignment concepts, and common wear symptoms.
- Identifying worn ball joints, tie rod ends, and bushings
- Understanding basic alignment angles and their symptoms
- Steering system inspection procedures
Domain 5: Brakes (20%)
The second-largest area, covering hydraulic systems, friction components, and inspection procedures.
- Disc and drum brake inspection and service basics
- Hydraulic system components and fluid handling
- Recognizing warning signs of brake system failure
Domain 1: Engine Systems (16%)
Covers general engine operation, lubrication, cooling, and basic diagnostic reasoning for engine-related complaints.
- Engine mechanical fundamentals
- Cooling and lubrication system checks
- Basic engine performance symptoms
Domain 6: Electrical (15%)
Focuses on basic electrical theory, battery, starting, and charging systems.
- Battery testing and service
- Starting and charging system basics
- Basic circuit and wiring diagnostics
Domain 3: Manual Drive Train and Axles (11%)
Covers clutches, drive shafts, differentials, and related components at a general maintenance level.
- Clutch operation and inspection
- Driveline and axle basics
Domain 2: Automatic Transmission/Transaxle (7%)
A smaller but still tested area covering fluid maintenance and basic operational knowledge.
- Fluid checks and service intervals
- Basic transmission operation concepts
Domain 7: Heating, Ventilation, and Air Conditioning (7%)
Covers HVAC system components and general service knowledge.
- Refrigerant handling basics
- Heating and cooling system components
For a much deeper breakdown of each domain with specific subtopics, see ASE G1 Exam Domains 2026: Complete Guide to All 7 Content Areas. If you want to gauge how tough the material feels relative to other technician tests, How Hard Is the ASE G1 Exam? Complete Difficulty Guide 2026 covers that in detail.
Registration, Fees, and Scheduling
ASE G1 registration runs through Prometric. The current fee structure is $62 for the test itself plus a $34 registration fee per order - or $96 total when G1 is the only test you're purchasing in that order. If you're bundling G1 with other ASE tests, the registration fee is shared across the order rather than charged per test.
Initial certification testing is offered at Prometric test centers, giving candidates flexibility on scheduling around work hours. A full pricing breakdown, including how the fees stack when ordering multiple tests, is available in ASE G1 Certification Cost 2026: Complete Pricing Breakdown. For scheduling windows and how far in advance to book, check ASE G1 Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
| Item | Detail |
|---|---|
| Governing body | National Institute for Automotive Service Excellence |
| Test delivery | Prometric test centers |
| Scored questions | 55 |
| Unscored research questions | 10 |
| Total questions | 65 |
| Time allowed | 90 minutes |
| Languages | English and Spanish |
| Base fee | $62 + $34 registration fee ($96 if G1 is the only test ordered) |
| Certification validity | 5 years |
The Experience Requirement
Passing the exam alone doesn't grant certification. ASE requires candidates to also have one year of full-time, relevant hands-on repair experience, or an approved combination of formal training and hands-on experience that meets ASE's equivalency standards.
Importantly, candidates aren't blocked from testing while they're still accumulating that experience - you can sit for the G1 exam before your year of experience is complete. However, ASE will withhold official certification until the experience requirement is fully documented and verified. This makes it possible to test early in a career and lock in certification as soon as the experience threshold is met.
For the exact documentation ASE expects and how training hours can substitute for work experience, see ASE G1 Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Certification Term and Recertification
Once earned, ASE G1 certification is valid for five years. To keep it active, certified technicians take the G1R recertification test - a shorter exam with 28 questions and a 45-minute time limit, covering the same domain structure but at a reduced length appropriate for someone already working in the field.
Because the initial exam and the passing standard both matter for planning your study timeline, it's worth reviewing ASE G1 Passing Score 2026: Exactly What You Need to Pass so you know what target you're actually studying toward, not just how many questions exist.
How to Approach Preparation
Given that Suspension and Steering and Brakes together account for nearly half the scored questions, an efficient study plan front-loads those two domains before moving to Engine Systems and Electrical, then finishes with the smaller-weighted areas - Manual Drive Train and Axles, Automatic Transmission/Transaxle, and HVAC.
Suspension and Steering + Brakes
- Master alignment symptoms, suspension components, and hydraulic brake fundamentals since these two domains make up 44% of the test
Engine Systems + Electrical
- Review lubrication, cooling, battery, starting, and charging system basics
Drivetrain, Transmission, HVAC
- Cover the smaller-weighted domains: clutches, driveline, transmission fluid service, and HVAC components
Timed practice and review
- Run full-length practice sets under a 90-minute clock and revisit missed domains
For a structured, step-by-step plan built around this exact domain weighting, see ASE G1 Study Guide 2026: How to Pass on Your First Attempt. If you want a fast-reference review sheet for the final days before your test, the ASE G1 Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses the must-know points into one page.
Running realistic, timed practice questions on our ASE G1 practice test platform is one of the most direct ways to get comfortable with the scenario-based question style before test day. Since the real exam mixes scored and unscored questions without telling you which is which, practicing under full-length, timed conditions on the practice site builds the pacing habits you'll need at the Prometric center.
Key Takeaway
Don't split study time evenly across all seven domains - allocate roughly proportional to the exam's weighting, with Suspension/Steering and Brakes getting the most attention.
Frequently Asked Questions
The current G1 exam has 65 total questions - 55 that are scored and 10 unscored research questions - with 90 minutes allowed to complete them.
The test fee is $62 plus a $34 registration fee per order, or $96 total if G1 is the only test purchased in that order.
You can take the exam before completing your experience requirement, but ASE will withhold official certification until you document one year of full-time relevant hands-on experience or an approved training/experience combination.
Certification is valid for five years. Renewal is done by passing the G1R recertification test, which has 28 questions and a 45-minute time limit.
Suspension and Steering (24%) and Brakes (20%) are the two largest content areas and together make up nearly half the exam, so they deserve the most study time.
Understanding exactly what ASE G1 tests - and how its 65 questions are distributed across seven weighted domains - is the foundation for building an efficient study plan rather than studying everything equally. Start with the two heaviest domains, use realistic timed practice, and let the fee and experience mechanics guide when you actually schedule your test date.