ASE Certification Guide

Who writes this guide, and from what

ASE Certification Guide is an independent study site for ASE technician tests. ASE (the National Institute for Automotive Service Excellence) doesn't run, review or endorse it. Neither does Prometric, which delivers the tests, nor any school, tool maker or parts brand.

Who we are

A small independent publisher of test-prep material. We don't write or sell ASE tests, we don't train technicians, and no ASE-certified technician signs off these pages, so we don't claim one does.

What we offer in place of a byline is a trail: every fact in a table links the ASE document it came from and shows the month we checked it. There are no ads here. Each test also has a practice app, and the app buttons are how the site pays for itself.

Where the facts come from

Test facts come only from ASE's own documents, never from another prep site. Career and license facts on the career guides come from the U.S. Bureau of Labor Statistics and California's Bureau of Automotive Repair, linked where they are used. The ASE documents:

Each fact is stored once and every page reads it from that one record. Fix a fee there and every table and sentence that uses it changes with it.

When ASE's documents disagree

They sometimes do, and we say so in the table instead of quietly picking one:

  • G1 question count. The G1 guide prints "45 scored" on page 3 and a total of 50 on page 4, yet its own area counts add up to 55. ASE's G1 web page gives the same 55, so that is the figure we print.
  • The truck series. The truck guide's introduction says "T1-T9"; ASE lists T1–T8 everywhere else.
  • Score reports. Both documents say the report is emailed when you finish. They differ on when results reach myASE: within 24 hours in most cases, says the FAQ; within 5 days, says the Need to Know guide.

The rule: take the figure the document's own arithmetic and ASE's current web page both support, and name the other one in the detail cell.

What we compared year to year

We checked the 2026 automobile guide against the 2025 edition line by line. A1 changed most (50 → 45 scored), and the ASE A2 test was rewritten too. A5, A6 and A8 came through as they were. There was no earlier G1 or truck guide to compare, so those pages make no "what changed" claim.

Fees carry an "as of" date. ASE publishes them for each year's registration windows, so we check the fee page again whenever a new window opens. Open now: Oct 10–Dec 31 (fall 2026).

What we won't print

  • A passing percentage. ASE releases neither a cut score nor the questions you missed, so any number would be a guess.
  • Pass rates per test, unless ASE publishes them.
  • Recalled test items, or anything that claims to be one.

How the practice questions are made

  • Each question is tagged with the content area of that test's official study guide.
  • Every option, right or wrong, gets its own explanation, so a wrong pick still shows you the reasoning.
  • The answer key is checked, then a reviewer who didn't write the question works it blind and goes through every explanation. A question that fails goes back for a fix or is replaced.
  • None of them is an ASE question. ASE doesn't release its items, and how many options a question has here says nothing about the real test.

Spotted a mistake?

Compare it with the source linked in the table. Where ASE's page says something different, ASE is right. The contact page explains how corrections work here and who to ask about registration, scores and certificates.