Part 396 — Inspection, Repair, and Maintenance
49 CFR Part 396: Federal requirements for systematic vehicle inspection, repair, maintenance, and driver inspection reports.
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49 CFR Part 396 requires motor carriers to systematically inspect, repair, and maintain every commercial motor vehicle they operate. The regulation establishes three levels of compliance obligation: the periodic (annual) inspection requirement, the driver vehicle inspection report (DVIR) requirement, and the maintenance records requirement.
The periodic inspection under Part 396 must be conducted at least once every 12 months for every vehicle. It must cover the systems and components specified in Appendix G to Part 396, which aligns with CVSA’s Level I inspection criteria. The inspection can be performed by the carrier’s own qualified mechanics or by a third-party inspection service, and the inspection report must be retained. Vehicles that pass receive a dated inspection decal that is recognizable to roadside officers.
Driver Vehicle Inspection Reports (DVIRs) under Part 396 require drivers to prepare a written or electronic report at the end of each driving day, noting any defects or deficiencies discovered. As of February 2026, electronic DVIRs are explicitly confirmed as legally valid — no wet-ink signature is required. Mechanics who repair noted deficiencies must certify the repair, and the next driver must review the report before operating the vehicle.
Key Provisions
- Requires annual periodic inspection of every commercial motor vehicle — must cover Appendix G components.
- Drivers must prepare Driver Vehicle Inspection Reports (DVIRs) at the end of each driving day.
- Electronic DVIRs are explicitly legal as of February 2026 — no wet-ink signature required.
- Mechanics must certify repair of any deficiencies noted on DVIRs before the vehicle returns to service.
- Maintenance records must be retained for each vehicle for defined periods under Part 379.
Why It Matters to Truck Owners
Part 396 compliance is directly observable at roadside — an out-of-service DVIR that hasn’t been signed off by a mechanic, a vehicle without a current annual inspection decal, or missing maintenance records are all violations that officers check for. When buying a used commercial truck, reviewing the maintenance records and annual inspection history under Part 396 is the most important pre-purchase due diligence step. Gaps in the maintenance history can indicate hidden mechanical problems or compliance negligence.
Frequently Asked Questions
How often must a commercial truck be inspected under Part 396?
Part 396 requires a periodic inspection at least once every 12 months covering the systems and components in Appendix G. Roadside inspections by CVSA officers do not substitute for the periodic inspection requirement — a truck that passes a Level I roadside inspection still needs its annual inspection on schedule.
What is a DVIR and when must drivers complete it?
A Driver Vehicle Inspection Report is a written or electronic record that drivers prepare at the end of each driving day noting any vehicle defects or deficiencies discovered. DVIRs must be completed even if no defects are found — the regulation requires notation of no defects when the vehicle is satisfactory.
Are electronic DVIRs legally acceptable?
Yes — as of February 2026, FMCSA formally clarified that electronic DVIRs, including electronic signatures from both drivers and mechanics, satisfy the Part 396 requirement. No wet-ink or paper signature is required. The electronic DVIR must be stored in a way that keeps it accessible and tamper-evident.
Read the official legal text: 49 CFR Part 396 — eCFR.gov (official)
Related Federal Trucking Laws
- Part 393 — Parts and Accessories for Safe Operation
- Part 395 — Hours of Service of Drivers
- Part 391 — Driver Qualifications
- Part 379 — Preservation of Records
This page is provided for informational purposes only and is not legal advice. Always verify current requirements at fmcsa.dot.gov or with a qualified transportation attorney.
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