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DOT Inspection Prep Guide

Know exactly what DOT inspectors check for your vehicle type. Cargo van drivers: you may be exempt from most inspections. Box truck operators: here's your complete prep checklist.

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Equipment Type

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Pre-Trip Inspection Routine

  1. 1

    Approach

    Walk toward the vehicle. Check for leaks under the vehicle (oil, coolant, fuel). Note overall condition.

  2. 2

    Engine Compartment

    Check fluid levels (oil, coolant, power steering, washer). Inspect belts and hoses for wear or cracks.

  3. 3

    Front of Vehicle

    Headlights (high and low beam), turn signals, windshield condition, wiper blades, license plate and light.

  4. 4

    Driver Side

    Mirror condition and adjustment, door operation, fuel tank (cap secure, no leaks), tires (tread depth, inflation, lug nuts, sidewall condition).

  5. 5

    Rear of Vehicle

    Taillights, brake lights, turn signals, reflectors, reflective tape, cargo door operation, load securement.

  6. 5b

    Coupling Area (tractor-trailer only)

    Fifth wheel latch engaged and locked, no gap between apron and trailer plate, kingpin not cracked or worn, safety chains/cables connected and crossed, air and electrical lines properly connected with no leaks, landing gear fully raised.

  7. 6

    Passenger Side

    Mirror condition, tires, exhaust system (no leaks, properly mounted).

  8. 7

    Cab Interior

    All gauges operational, steering wheel play (no more than 2" free play), horn, seatbelt, emergency equipment (fire extinguisher, reflective triangles).

Common Violations & Fix-It Guide

ViolationSeverityOOS?How to Prevent
Brake adjustment / componentsHighYesPre-trip: check brake stroke, listen for air leaks. Adjustment out of spec is the #1 OOS violation.
Tire tread depth / conditionHighYesMinimum 4/32" on steer tires, 2/32" on drive tires. Check sidewalls for cuts, bulges, exposed cord.
Lighting / reflectorsHighSometimes28% of all roadside violations (CVSA 2024). Walk-around check: all headlights, taillights, turn signals, brake lights, marker lights, reflectors. Replace burned bulbs immediately.
Hours of Service violationMediumYesKeep ELD logs current. Don't drive past the 11-hour driving limit or 14-hour on-duty window.
Expired medical cardMediumYesSet a calendar reminder 60 days before expiration. Renewal takes 1–2 weeks.
No annual vehicle inspectionMediumYesSchedule annually. Keep the inspection report in the vehicle at all times.
Windshield / wipersLowSometimesReplace cracked windshield (cracks in driver's field of vision = OOS). Check wiper blades monthly.
Leaking fluidsMediumSometimesCheck under vehicle before departure. Oil, coolant, or fuel leaks can result in OOS.
Coupling devices (fifth wheel, kingpin)HighYesCheck fifth wheel latch, kingpin wear, safety chains. Applies to tractor-trailer only.

OOS = Out of Service — the inspector can park your truck until the issue is fixed. You cannot drive until repairs are made.

The most thorough inspection. Inspector checks driver credentials AND performs a complete vehicle mechanical exam (including crawling under the vehicle).

What's checked

  • Driver's license and endorsements
  • Medical card (DOT Medical Examiner's Certificate)
  • Hours of Service logs (ELD or paper)
  • Vehicle registration and insurance
  • Brake system (adjustment, components, air leaks)
  • Steering and suspension
  • Frame and body
  • Tires and wheels (tread depth, inflation, lug nuts)
  • Exhaust system
  • Lighting and reflectors
  • Coupling devices (if tractor-trailer)
  • Fuel system
  • Windshield and wipers

Frequency: Level I + Level II account for 90%+ of all inspections combined. Level I is the most thorough — takes 30–60 minutes.

sprinterbox-trucksemi

Driver credentials check plus exterior vehicle walk-around. Inspector does NOT crawl under the vehicle.

What's checked

  • Everything in driver credential check (license, medical card, HOS)
  • Exterior walk-around: tires, lights, leaks, body damage, load securement
  • No under-vehicle inspection

Frequency: Most common single inspection type. Takes 15–30 minutes.

sprinterbox-trucksemi

Driver credentials only. No vehicle inspection.

What's checked

  • License class and endorsements
  • Medical card validity
  • HOS compliance (ELD or paper logs)
  • Drug and alcohol testing (if selected for random)
  • Seatbelt use

Frequency: Less common than Level I/II. Quick — 10–15 minutes.

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One-time examination of a specific item (e.g., a recall check or specific safety concern).

Frequency: Rare. Usually targeted.

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Vehicle mechanical inspection without the driver present (e.g., parked truck at a facility).

Frequency: Rare.

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Enhanced inspection for vehicles carrying hazardous materials. Includes radiological checks for certain materials.

Frequency: Only for hazmat carriers. Not applicable to most expedited carriers.

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DOT Inspection Prep by Equipment

Select your equipment type to see a tailored checklist with only the requirements that apply to your vehicle class.

Mostly Exempt

Under 10,001 lbs GVWR — exempt from most federal DOT requirements.

6,000 - 9,500 lbsCargo Van

Partial Compliance

10,001–26,000 lbs GVWR — subject to DOT inspections but exempt from CDL, IFTA, and IRP.

8,500 - 14,000 lbsSprinter

Full Compliance

Full DOT scope applies. Box trucks avoid CDL; semis require everything.

10,001 - 26,000 lbsBox Truck26,001 - 80,000 lbsSemi / Dry Van

These tools are provided for informational purposes and should not be treated as legal, tax, or financial advice.