Short answer: the federal annual DOT inspection (49 CFR 396.17) and California's 90-day BIT inspection (California Vehicle Code 34505.5) are two different requirements on two different schedules, and running one does not excuse a California-based carrier from the other. The annual inspection happens once every 12 months and covers the full Appendix A checklist. California's 90-day inspection happens four times a year and covers a narrower, specific list of systems written directly into the state statute.
| Federal Annual (49 CFR 396.17) | California 90-Day (CVC 34505.5) | |
|---|---|---|
| Interval | Every 12 months | At least every 90 days |
| Who it applies to | Commercial motor vehicles subject to Part 396 | Motor carriers operating specified vehicles under Vehicle Code Section 34500, most commonly heavier California-based commercial vehicles |
| What it covers | Every component in Appendix A: brakes, coupling devices, exhaust, fuel system, lighting, steering, suspension, frame, tires, wheels, glazing, wipers, and more | Brake adjustment; brake system components and leaks; steering and suspension systems; tires and wheels; vehicle connecting devices |
| Record retention | 14 months (396.21(b)(1)) | 2 years, kept at the carrier's terminal (CVC 34505.5(c)) |
The federal annual inspection
Every commercial motor vehicle covered by Part 396 has to pass an inspection covering the full Appendix A parts list at least once every 12 months, per 396.17(a) and (c). the full Appendix A checklist breaks down exactly what that list contains. This requirement applies to commercial vehicles nationwide, regardless of state.
California's 90-day inspection
California Vehicle Code Section 34505.5 layers an additional, more frequent inspection on top of the federal annual for carriers operating the vehicles it covers. The statute requires that carriers "conduct inspections at least every 90 days as part of systematic maintenance services," covering a specific, shorter list: brake adjustment; brake system components and leaks; steering and suspension systems; tires and wheels; and vehicle connecting devices. CVC 34505.5(b) requires that a vehicle not operate on the highway until any defects found are corrected and confirmed by the carrier's authorized representative's signature. CVC 34505.5(c) requires inspection records, including the vehicle identification, inspection dates, and the nature of inspections and repairs, to be kept at the carrier's terminal for two years and made available to the California Highway Patrol on request. Under CVC 34505.5(e), interstate carriers not based in California do not have to retain those 90-day records in the state, though their vehicles remain subject to inspection while operating there.
This 90-day cycle is commonly associated with California's Basic Inspection of Terminals (BIT) program, which the California Highway Patrol administers for carriers operating a California terminal. The 90-day vehicle inspection under CVC 34505.5 and a BIT terminal audit are related but distinct: the 90-day rule is about the vehicle's brakes, steering, tires, and coupling devices on a quarterly cycle, while a terminal-level review looks at the carrier's overall maintenance and recordkeeping program.
Why both requirements can apply at once
A California-based carrier running heavier commercial vehicles is not choosing between the annual inspection and the 90-day inspection. The 90-day inspection does not fulfill the federal annual requirement, and the annual inspection does not fulfill the state's 90-day requirement, because they check different things on different schedules. A vehicle can be current on its federal annual and still be overdue on its California 90-day check, or the reverse.
The narrower scope of the 90-day check
It is worth being specific about scope, because this is where the two rules get confused most often. The federal Appendix A checklist covers fifteen separate categories, including the exhaust system, fuel system, lighting, frame, windshield glazing, and rear impact guards, none of which appear in the CVC 34505.5(a) list. The 90-day inspection is deliberately narrower and faster, built around the systems most likely to develop a safety issue between annual inspections: brakes, steering, suspension, tires, wheels, and connecting devices (fifth wheels, pintle hooks, and similar hardware).
Marking each inspection correctly
Because these are two separate records on two separate cycles, most California fleets mark vehicles with two different labels rather than trying to combine them into one. Our custom 90-day BIT inspection decals are personalized with your company name and logo, sized to cover any interval from 30 to 180 days or a full annual cycle if you want the same design family across both, in 6 colors, and printed for any year from 2026 through 2031. The separate FHWA/FMCSA annual inspection labels are built specifically around the 12-month federal cycle with a 2026-2030 year grid. Keeping the two label formats visually distinct on the vehicle makes it faster for a driver, a mechanic, or an officer to tell at a glance which inspection is current and which is coming due.
Shop
- Custom 90-day BIT / DOT inspection decals, personalized with your company name, logo, and choice of 6 colors, valid 2026-2031, the direct place to order this label rather than reading about it secondhand.
- FHWA/FMCSA annual inspection labels for the separate 12-month federal cycle.
- Browse the full inspection labels collection or the DOT inspection label guide to compare every format side by side.
Frequently Asked Questions
Does passing California's 90-day inspection count as my annual DOT inspection?
No. They are separate requirements under separate rules, 49 CFR 396.17 for the federal annual and CVC 34505.5 for California's 90-day cycle, and one does not substitute for the other.
What does the 90-day inspection actually check?
Brake adjustment, brake system components and leaks, steering and suspension systems, tires and wheels, and vehicle connecting devices, per CVC 34505.5(a). It is narrower than the full federal Appendix A checklist.
How long do I have to keep 90-day inspection records?
Two years, kept at the carrier's terminal, per CVC 34505.5(c). That is longer than the 14-month retention period for federal annual inspection reports.
Where do I buy a custom 90-day BIT decal with our company name on it?
Directly on our custom 90-day BIT inspection decal product page, where you can choose a color, a state or no state, and any wording change you need.
Complete guides
- 90-day inspection labels for trucks: what they are, who uses them, and how to order
- FHWA inspection stickers: what FHWA means on a truck label
- FMCSA annual inspection labels: what must be on the sticker
About Wood Unlimited
We print DOT inspection and compliance labels on weatherproof vinyl, printed in Alabama, USA, for single trucks and full fleets. A label is a visual indicator on the vehicle. The inspection itself, performed by a qualified inspector and documented under the applicable rule, is what the regulation actually requires.