Annual Bus Inspection Prep Checklist (49 CFR 396.17)

The annual bus inspection (49 CFR 396.17) is non-negotiable. Every bus must pass or be out of service. Fleets that prepare systematically pass cleanly. Fleets that improvise fail, rack up violations, and waste time in remediation. This checklist is built on 49 CFR 396.17 Appendix A and covers every inspection point. Use it 2–4 weeks before your inspection appointment. Identify defects early. Fix them before the inspector shows up. Pass your inspection clean.

Compliance Checklist

Prepare before the inspection. Use this checklist to catch defects early and pass your annual inspection clean.

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BRAKES & BRAKE SYSTEM

Brake lining thickness ≥4/32" steer axle, ≥2/32" drive axle Brake drums/rotors not cracked, wear within limits Air brake pressure builds to 90 PSI in <45 seconds Pressure loss rate <2 PSI/minute with no brake pedal applied Service brakes apply smoothly, stop vehicle straight Spring brakes engage at approximately 60 PSI pressure drop Brake warning lights and buzzers functional Air dryer cartridge replaced within 12 months All brake lines secure, no leaks or cracks

TIRES & WHEELS

Steer tires: tread depth ≥4/32" all positions Drive/trailer tires: tread depth ≥2/32" No bald spots, bulges, cracks, or sidewall damage Tires properly inflated to manufacturer spec Wheel nuts and bolts tight, no cracks in wheels All lug nuts present and tight No uneven wear patterns

LIGHTING & REFLECTORS

Headlights bright, aimed correctly, not dim or cracked Parking and marker lights operational and visible Stop lights and brake lights functional, lens intact Turn signals functional with correct blink rate Hazard lights functional with correct blink rate All reflectors intact, clean, and visible Interior lights operational if equipped

EMERGENCY EXIT & ACCESSIBILITY

Emergency exit doors open and close smoothly, signs visible Emergency window exits operational, labels intact Wheelchair lift cycles smoothly if equipped, safety sensors functional Wheelchair securement devices operational, not missing Grab bars secure, no loose bars or cracks Handrails intact, not bent or missing ADA compliance signage present and correct

STEERING & SUSPENSION

Steering wheel operates smoothly, no excessive play Steering linkage has no visible cracks or loose connections Suspension components not damaged or leaking Air suspension holds pressure if equipped, no hissing Bushings show no excessive wear, rubber intact

ENGINE & EMISSIONS

No visible fluid leaks including oil, coolant, fuel, or transmission fluid Engine oil level adequate, not overfilled Coolant level adequate, no leaks in hoses or radiator Air filter clean, not clogged Fuel system has no leaks, fuel cap tight Engine runs smoothly, no unusual noises Diesel emissions system not over-smoking if equipped

TRANSMISSION & DRIVETRAIN

Transmission fluid level adequate, not discolored or burnt smelling Transmission shifts smoothly, no grinding or hard shifts Driveshaft has no visible cracks and is balanced U-joints not worn or loose Differential has no leaks and proper gear oil level

BODY & STRUCTURE

No visible rust or corrosion affecting structural integrity Doors open and close smoothly, locks secure, no cracks Windows have no large cracks and seals are intact Mirrors intact, secure, and not missing Bumpers secure, not dragging, no cracks Overall body has no major dents or damage affecting safety

Inspection Notes: List any defects found. Create work orders for repairs. Fix before inspection appointment. Document completion. Bring maintenance records to inspection.

Ready for inspection? When all items are checked and defects are repaired, schedule your annual inspection with DOT or state authority.

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