DOT Pre-Trip & Post-Trip Inspection Checklist: 7 Essential Zones Every CDL Driver Must Check

Federal Motor Carrier Safety Administration (FMCSA) regulation 49 CFR § 396.11 mandates thorough pre-trip and post-trip driver vehicle inspection reports (DVIR) to ensure vehicle roadworthiness.

The 7 Inspection Zones

1. Engine Compartment: Verify fluid levels (oil, coolant, power steering, washer fluid), inspect serpentine belts for fraying, and check for air line or fuel line chafing.
2. Steering & Front Axle: Check steering gearbox, pitman arm, drag link, tie rod ends, and leaf springs for cracks or missing U-bolts.
3. Brake System & Air Lines: Verify air brake chambers, pushrod travel (within 2 inches), slack adjusters, brake drums, and minimum 1/4-inch lining thickness.
4. Tires, Wheels & Rims: Inspect steer tire tread depth (minimum 4/32") and drive/trailer tires (minimum 2/32"), checking for sidewall cuts, proper PSI inflation, and tight lug nuts.
5. Coupling System & Fifth Wheel: Confirm kingpin is securely locked within fifth wheel jaws, release arm is in locked position, and safety latch is engaged with zero gap.
6. Trailer & Cargo Securement: Check landing gear fully raised, cargo doors latched, load locks/straps tensioned, and reflective DOT-C2 conspicuity tape visible.
7. Lighting & Electrical Harness: Verify clearance lights, turn signals, 4-way hazard flashers, and brake lights are 100% operational.