ASE Collision Repair Certification

Four trades and one specialty

Collision work is split into distinct trades. B2 covers painting and refinishing, B3 non-structural analysis and damage repair, B4 structural analysis and damage repair, and B5 mechanical and electrical components. Many technicians specialize, so a painter and a structural technician may hold very different sets.

B6 sits outside the Master set because it tests a different job. Damage analysis and estimating covers writing repair plans, vehicle construction, parts identification, legal and environmental practices, and customer relations, and it is aimed at estimators rather than hands-on repairers.

Experience rules are different for estimators

Hands-on repair certifications use the general work experience rule. B6 is different: ASE asks for 2 years of work experience specifically in damage analysis and estimating, not in hands-on collision repair. A repair technician who moves to the front office therefore starts counting estimating experience from the day they begin writing estimates.

Beyond ASE

The collision industry also uses I-CAR, a separate training organization, and manufacturers set their own repair procedures and certification programs. We have not verified the details of those programs for this page, so check the program websites for current requirements.

ASE results are most useful when combined with training on the specific materials and structures you repair. Aluminum, high-strength steel and driver-assistance sensors all change how a repair is done.

• ▸Painters often start with B2 and add B3 as they move toward full refinish work.
• ▸Structural technicians usually pair B4 with B3 and B5.
• ▸Estimators should look at B6 and its two-year estimating experience rule.

Keeping it current

Collision certifications expire after 5 years. Recertification tests run about half the length of the originals: 28 questions for B2 and B3, 25 for B4 and B5, and 25 for B6.

Choosing your first B test

Start with the trade you practice. A refinish technician usually begins with B2, a body technician with B3, and a technician who straightens frames and replaces structural parts with B4. B5, mechanical and electrical components, is often the least familiar for body technicians, even though modern collision repair means disconnecting and restoring wiring, cooling, steering and restraint components correctly.

Check the pace before you book. B2 and B3 each allow 90 minutes for 55 scored questions, which is about 1.6 minutes each, while B4 and B5 allow 75 minutes for 50.

Vehicle construction keeps changing, with mixed materials and more sensors on every bumper and windshield. Vehicle makers publish their own repair procedures, and following them is the normal reference in a professional shop, so test preparation should lean on the same material you use at work.

• ▸Painters can plan B2, then B3, as their work moves toward full refinish jobs.
• ▸Estimators can go to B6 without holding any of the B2 to B5 tests.
• ▸Shop managers often add B5 to understand the mechanical side of a repair plan.

ASE Collision Repair (B2 to B6): common questions

Where these facts come from

Test lengths, rules and fees are taken from the ASE pages listed under Sources and were checked on October 20, 2026. ASE can change them at any time, so confirm on ase.com before you register. ASE certification is a credential from a nonprofit, not a government license. AutoHire is not affiliated with ASE. Calculated totals, where shown, are AutoHire sums of ASE's published fees.

Data as of October 20, 2026.

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