Quick Answer
The annual DOT inspection is a periodic inspection that federal rules require for every commercial motor vehicle at least once every 12 months, under 49 CFR 396.17. Every tractor, trailer and converter dolly must pass every item in Appendix A to Part 396. A qualified inspector does the work, proof of the inspection rides on the vehicle, and you keep the report for 14 months.
Key Takeaways
- Each unit in a combination needs its own annual inspection. A tractor pulling a set of doubles with a dolly is four inspections, not one.
- The inspection must cover every item in Appendix A to Part 396, formerly Appendix G: brakes, coupling devices, exhaust, fuel, lights, safe loading, steering, suspension, frame, tires, wheels and rims, windshield, wipers, motorcoach seats and rear impact guard.
- Proof must be on the vehicle: either the full report or a decal or sticker showing the date, where the report is kept, the vehicle ID and a pass certification.
- You keep the report for 14 months where the vehicle is housed or maintained (49 CFR 396.21).
- A clean CVSA Level I or Level V roadside inspection does not count as your annual inspection. FMCSA guidance says so directly.
- New entrants automatically fail the safety audit if 51% or more of the vehicle records examined show no periodic inspection (49 CFR 385.321).
“The annual DOT inspection (49 CFR 396.17) is a required inspection of every commercial motor vehicle, including each trailer and converter dolly, at least once every 12 months against Appendix A to Part 396. A qualified inspector does it, proof rides on the vehicle, and the report is kept 14 months. A clean roadside inspection does not count.”
What are the annual DOT inspection requirements?
Section 396.17 says you can't operate a commercial motor vehicle unless each Appendix A component passed an inspection at least once in the preceding 12 months, and documentation of that inspection is on the vehicle.
The rule covers every vehicle under your control, not just the power unit, including the spare reefer that sits in the yard most of the year. If it moves under your USDOT number, it needs a current inspection.
The proof on the vehicle can be either of these:
- A copy of the full inspection report prepared under 396.21(a).
- A sticker or decal showing the inspection date, the name and address of whoever keeps the report, information identifying the vehicle (if it isn't clearly marked), and a certification that it passed a 396.17 inspection.
The annual inspection doesn't replace your daily pre-trip inspection or the DVIR. Section 396.3 also requires systematic maintenance records, kept 1 year and for 6 months after a vehicle leaves your control.
What is on the DOT annual inspection checklist?
The checklist is Appendix A to Part 396, "Minimum Periodic Inspection Standards." A vehicle fails if it has any one of the listed defects, and every shop form has to cover all 15 systems below.
Appendix A system | Examples of what fails |
|---|---|
1. Brake system | Pushrod stroke past the readjustment limit, air drum lining under 1/4 inch, audible air leaks, cracked drums, low-air warning that doesn't work at 55 psi or below, inoperative tractor protection valve, ABS warning lamp faults, auto slack replaced with a manual adjuster |
2. Coupling devices | Fifth wheel with more than 1/2 inch of horizontal movement between the upper and lower halves, kingpin not engaged, cracked pintle hook, worn or improperly repaired safety chains |
3. Exhaust system | Any leak forward of or directly below the cab or sleeper |
4. Fuel system | A visible leak anywhere, a missing filler cap, a loose tank |
5. Lighting devices | Any lamp or reflector required by Part 393 that doesn't work |
6. Safe loading | A spare tire, load or dunnage that could fall onto the road, a missing front-end structure, damaged intermodal container locks |
7. Steering mechanism | Too much free play (on a 20-inch wheel, more than 2 1/2 inches manual or 5 1/4 inches power), cracked or weld-repaired steering parts, loose gearbox bolts |
8. Suspension | Broken leaves or main leaf, cracked U-bolts or hangers that let the axle shift, deflated air suspension, broken torque rods |
9. Frame | Cracked, broken or sagging frame members, body or frame contacting a tire, sliding-axle locking pins missing or not engaged |
10. Tires | Steer tires under 4/32 inch tread, other tires under 2/32 inch, exposed ply or belt, flats or audible leaks, recaps on bus front tires |
11. Wheels and rims | Cracked rims, elongated bolt holes, loose or missing lug nuts, welded repairs on steer-axle aluminum wheels |
12. Windshield glazing | Cracks or damage in the driver's view beyond the allowed sizes |
13. Windshield wipers | An inoperative wiper on a power unit |
14. Motorcoach seats | A passenger seat not securely fastened |
15. Rear impact guard | On trailers 10,001 lb GVWR or more built on or after January 26, 1998: guard missing, loose, or more than 22 inches above the ground |
Brakes take up the biggest share of Appendix A. An out-of-adjustment automatic slack can't just be re-adjusted to pass; the cause has to be found and fixed.
Buses have one extra item outside Appendix A: 396.3(a)(2) requires pushout windows, emergency doors and emergency door marking lights to be inspected at least every 90 days.
How long is a DOT inspection sticker good for?
A DOT annual inspection sticker is good for 12 months. Section 396.17(c) requires a passed inspection "at least once during the preceding 12 months," so once the 12 months are up the sticker no longer covers you.
Example: your trailer passed on March 10, 2026. Schedule the next inspection before March 10, 2027.
Under 396.17(f), inspections done in an FMCSA-approved state program count for 12 months from the last day of the inspection month, so a state inspection on March 10, 2026 covers you through March 31, 2027. For other inspections, use the anniversary date.
Don't confuse the annual sticker with the CVSA decal an officer applies after a clean roadside Level I or V. That decal is only good for up to three months and serves a different purpose. See our DOT inspection levels guide.
Who can perform an annual DOT inspection?
Under 396.17(d) and (e), any of these can do it:
- You (the motor carrier), using your own qualified mechanic or yourself if you're qualified.
- An agent, such as a commercial garage, fleet leasing company, truck stop or similar business with proper facilities and qualified inspectors.
- A state program. If your vehicle is subject to a mandatory state inspection program that FMCSA has found as effective as 396.17, you must use that program (396.23).
The person signing has to meet 49 CFR 396.19. They must understand the Part 393 and Appendix A criteria, know the tools and methods, and have either:
- a federal- or state-sponsored training program or a state or Canadian inspector certificate, or
- at least 1 year of combined training or experience, such as a manufacturer training program, or work as a mechanic or inspector at a carrier, garage or leasing company, or as a government CMV inspector.
You must keep evidence of the inspector's qualifications for as long as they do your inspections, plus one year. That doesn't apply to state-program inspections. Anyone who works on or inspects brakes also has to meet the brake inspector rules in 396.25.
FMCSA's CSA Safety Planner lists approved state programs including California, New York, Pennsylvania, Texas, Virginia and about a dozen others, plus the Canadian provinces and Mexico. Some cover only buses. Confirm your state's status, since the list changes.
Does a roadside inspection count as an annual inspection?
No. FMCSA's regulatory guidance on 396.23 says a violation-free CVSA Level I or Level V inspection "is not equivalent to the Federal periodic inspection requirements."
Older articles say otherwise because the rule used to allow it. A 2016 FMCSA rule removed that option, since roadside inspections don't check every Appendix A item. A CVSA decal from a scale house may spare you a re-inspection while it's valid, but it does nothing for your annual requirement.
What records do you need to keep?
Under 49 CFR 396.21, the inspector's report must:
- identify the inspector, the motor carrier, the date and the vehicle
- list the components inspected and the results, including anything that didn't meet Appendix A
- certify that the inspection is accurate and complete
Keep the original or a copy for 14 months from the report date, where the vehicle is housed or maintained, and produce it when an official asks. If someone else did the last inspection, you're still responsible for getting a copy on demand.
What happens if you skip the annual inspection?
Running a vehicle without a current periodic inspection is a 396.17 violation at roadside and in an audit. Section 396.17(h) makes a carrier that fails to properly perform the inspection subject to the civil penalties in 49 U.S.C. 521(b). Current inflation-adjusted amounts are in Part 386 Appendix B.
New carriers face a bigger risk. Under 49 CFR 385.321, "using a commercial motor vehicle not periodically inspected" is one of 16 automatic-failure violations in the new entrant safety audit. It triggers failure when 51% or more of the examined records show the violation. Missing annuals on a one-truck, one-trailer operation can mean 100%.
How do you get an annual DOT inspection done?
- List every unit you operate: power units, trailers, dollies and spare equipment.
- Check whether your state runs an FMCSA-approved program. If it does and your vehicle is subject to it, use that program.
- If not, pick a qualified inspector: a truck shop, a dealer, a leasing company, or your own mechanic who meets 396.19.
- Ask for an Appendix A-based form and a decal with the date, the vehicle ID, your name and address, and a pass certification.
- Fix any failed items before the vehicle goes back into service, and get the passing report.
- Put the decal on the vehicle (or the report copy in the cab), and file the report for 14 months. If you inspected in-house, file the inspector's qualifications too.
- Set a reminder about 30 days before each unit's anniversary date.
Educational content, not legal advice. Confirm requirements against current FMCSA regulations and your state's rules.
FAQ
Do trailers need an annual DOT inspection?
Yes. Section 396.17(a) counts each vehicle in a combination as a commercial motor vehicle, so every semitrailer, full trailer and converter dolly needs its own inspection and its own proof.
Can an owner-operator do their own annual inspection?
Yes, if you meet the 396.19 qualifications, your vehicle isn't subject to a mandatory state program, and you keep proof of your qualifications. If you're leased on, check who your carrier holds responsible for the inspection.
Is the annual DOT inspection the same as a DVIR?
No. A DVIR is the driver's report after each workday under 396.11. The annual inspection is a once-a-year, Appendix A-based inspection by a qualified inspector under 396.17.
What's the difference between Appendix G and Appendix A?
They're the same standard. FMCSA moved the Minimum Periodic Inspection Standards from Appendix G to Subchapter B into Appendix A to Part 396 in 2021, so older forms citing Appendix G cover the same items.
