Under 49 CFR 396.17, every commercial motor vehicle — including each segment of a combination vehicle — must be inspected at minimum once during the preceding 12 months. For a tractor-trailer combination, that means the tractor, the semitrailer, and any full trailer (including converter dollies) must each be separately inspected. The inspection must be performed by a qualified inspector who understands Part 393 and Appendix G standards and is able to identify defective components.
The inspection must cover, at minimum: brake systems, coupling devices, exhaust systems, fuel systems, lighting devices, safe loading, steering mechanisms, suspension, frame, tires, wheels and rims, windshield glazing, windshield wipers, and rear impact guards. Documentation — either the inspection report itself or a compliant sticker/decal — must be on the vehicle and contain the inspection date, the motor carrier’s name and address, vehicle identification, and certification that it passed. The last 14 months of inspection records must be retained on file.
The penalties for operating a vehicle with an expired or missing annual inspection range from fines to out-of-service orders. Beyond the fine, an out-of-service vehicle on the roadside is a direct revenue loss and a Vehicle Maintenance BASIC violation that affects your CSA percentile for 24 months.