Annual DOT Vehicle Inspections: What 396.17 Requires and How to Stay Current

Operating a vehicle that hasn’t been periodically inspected is one of the violations that can fail a new entrant audit, and an expired inspection is an easy catch at roadside. The rule itself is simple — once a year, every vehicle — but in a mixed fleet of tractors and trailers, dates drift and units get missed.

What the rule requires

Under 49 CFR 396.17, every commercial motor vehicle — including each trailer and converter dolly — must pass a periodic inspection at least once every 12 months. The inspection must cover at least the components in Appendix G to the Federal Motor Carrier Safety Regulations: brakes, coupling devices, exhaust, fuel system, lighting, safe loading, steering, suspension, frame, tires, wheels and rims, windshield glazing and wipers, and more.

A vehicle that fails can’t be operated until the defects are repaired.

Who can do the inspection

The inspector must be qualified under §396.19, which means understanding the inspection criteria and being able to identify defective components — through a training program, a state or federal certification, or a combination of training and experience totalling at least one year. Carriers must keep evidence of each inspector’s qualifications for as long as they perform inspections and for one year after.

Your own mechanic can do it if they’re qualified; so can a dealer, a commercial shop or a leasing company.

State inspection programs

Some states run their own periodic inspection programs. FMCSA recognizes certain state programs as equivalent, so a vehicle that passes an approved state inspection can satisfy the federal requirement. Check whether your state’s program is on FMCSA’s equivalency list before relying on it.

What has to be in the vehicle

The vehicle must carry proof of its most recent inspection — either a copy of the inspection report or another form of documentation, such as a decal, that identifies the inspection and where the full report can be found.

Record retention

Keep the original or a copy of each periodic inspection report for 14 months from the date of the inspection, at the place where the vehicle is garaged or maintained. That’s long enough to show the current inspection and the one before it — exactly what an auditor will check to confirm there’s been no gap.

Where fleets slip

• Trailers forgotten. Tractors come in for service regularly; trailers can sit in a yard for months and their inspection date passes unnoticed.
• Leased and borrowed units. The carrier operating the vehicle is responsible for it being inspected, whoever owns it.
• No inspector qualification records. The inspection happened, but nothing shows the person was qualified.
• Report on file, nothing in the cab.

Track the date, not the paperwork

The way to never miss an annual inspection is to know each unit’s due date and schedule it a month ahead. TruckComply keeps each vehicle’s inspection, registration and maintenance records — and uploaded documents and photos — in one place, so the fleet’s compliance picture is visible unit by unit.