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DOT Annual Inspections as a Mobile Mechanic: Inspector Qualifications, the Report, and the Facility Question (49 CFR 396)

Updated 2026-10-17. Sources are listed at the end.

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This is general information, not legal or tax advice. Rules vary by state and change often. Confirm with the official source linked in each section, or with a licensed attorney, CPA or insurance agent, before you act.

If you service fleet trucks, there’s a recurring paid job built into federal rules: the annual (periodic) inspection. Every commercial motor vehicle a motor carrier operates in interstate commerce must pass one at least once every 12 months, with documentation on the vehicle (49 CFR 396.17(c)). The FMCSA threshold for a commercial motor vehicle starts at 10,001 lb GVWR/GCWR. See does a truck need a USDOT number?

Who can perform it

The carrier can do it themselves, or have “a commercial garage, fleet leasing company, truck stop, or other similar commercial business” do it as its agent, “provided that business operates and maintains facilities appropriate for commercial vehicle inspections and it employs qualified inspectors” (396.17(d)-(e)).

The mobile question. The rule doesn’t define “facilities appropriate for commercial vehicle inspections,” and it doesn’t mention mobile inspectors. Inspecting brakes, steering, suspension and frame per Appendix A means getting under the truck. Whether your setup, or the carrier’s own yard and pit, meets that standard is something to settle with the carrier and, if needed, FMCSA, before you sell the service. A carrier can also self-inspect under 396.17(d) using qualified individuals. Whether a contracted mobile tech counts as part of the carrier’s own inspection is a question for FMCSA (1-800-832-5660).

How a mechanic qualifies as an inspector

The person doing the inspection must (49 CFR 396.19):

  1. understand the inspection criteria in Part 393 and Appendix A to Part 396 and be able to identify defective components
  2. know, and have mastered, the methods, procedures, tools and equipment used in an inspection
  3. be capable through either a Federal- or State-sponsored training program or a State certificate, or at least 1 year of training or experience, such as:
    • a manufacturer-sponsored or similar commercial training program in CMV operation and maintenance
    • experience as a mechanic or inspector in a motor carrier maintenance program
    • experience as a mechanic or inspector in CMV maintenance at a commercial garage, fleet leasing company or similar facility
    • experience as a government CMV inspector

The carrier must keep evidence of your qualifications while you do its inspections and for one year after (396.19(b)). Have a one-page qualification statement ready, listing your training and dated work history, so the carrier can file it.

Brakes have their own rule

Anyone responsible for brake inspection, maintenance or repair on a carrier’s CMVs must meet a similar standard: a State, federal or union apprenticeship or approved training program, a State certificate (including passing the CDL air brake tests for brake inspections), or one year of brake-related training or experience (49 CFR 396.25).

The inspection report

The qualified inspector prepares a report that (49 CFR 396.21(a)):

The carrier keeps the report for 14 months where the vehicle is housed or maintained. The on-vehicle proof can be the report or a sticker or decal showing the date, where the report is kept, the vehicle ID, and a pass certification (396.17(c); 396.21(b)). Vehicles that pass a qualifying State periodic inspection program meet the requirement for 12 months (396.17(f)).

Pricing it

An annual inspection is a fixed-scope job, so price it flat by vehicle type and add repairs as separate, authorized lines. Make sure the flat price covers paperwork time (the report, the decal, the qualification statement), not just time under the truck. Run the numbers in the job quote & profit calculator, and see fleet maintenance accounts for contracts and net terms. Check your liability coverage for commercial vehicles before you sign. See mobile mechanic insurance types.

More on this topic

Sources