A five-minute walkaround before a truck leaves the yard is one of the cheapest ways to prevent a breakdown, a roadside violation, or worse. Pre-trip and post-trip inspections catch problems while they’re still small — and the paperwork that goes with them, the Driver Vehicle Inspection Report (DVIR), is a core part of staying DOT-compliant. Here’s a practical checklist your drivers can use every day, plus what the rules actually require.
Pre-Trip vs. Post-Trip: What’s the Difference?
- Pre-trip inspection — done before the vehicle is driven. Federal rules (49 CFR 396.13) require the driver to be satisfied the vehicle is in safe operating condition, review the last DVIR, and sign it if defects were reported and repairs were certified.
- Post-trip inspection — done at the end of the day’s work. Under 49 CFR 396.11, the driver reports any defect or deficiency they found or were made aware of that could affect safe operation or cause a breakdown.
Together they create a daily record of the vehicle’s condition — and a clear trigger for getting repairs done before the next dispatch.
Pre-Trip Inspection Checklist
Train drivers to follow the same order every time so nothing gets skipped:
1. Engine Compartment
- Oil, coolant, and power steering fluid levels
- Belts and hoses for cracks, fraying, or leaks
- Any fluid puddles under the truck
- DEF level on newer diesel engines
2. In the Cab
- Gauges and warning lights after start-up — oil pressure, temperature, air pressure, and any check-engine or aftertreatment lights
- Horn, wipers, washer fluid, heater and defroster
- Mirrors adjusted and undamaged; windshield free of cracks that block vision
- Seat belt and emergency equipment — fire extinguisher, warning triangles, spare fuses where required
3. Brakes
- Parking brake holds the vehicle
- Service brakes respond normally
- On air-brake trucks: air pressure builds properly, no audible leaks, low-air warning works, and slack adjusters and chambers look normal
Brake problems are among the most common reasons trucks are placed out of service. Our air brake maintenance guide covers the warning signs in more detail.
4. Tires, Wheels & Rims
- Correct inflation and adequate tread depth
- No cuts, bulges, or exposed cords
- Lug nuts present and tight — look for rust streaks or shiny metal around them
- Rims free of cracks or bends
See our commercial truck tire care guide for more on preventing blowouts.
5. Lights & Reflectors
- Headlights (high and low), turn signals, brake lights, clearance and marker lights, and four-way flashers
- Reflectors and reflective tape clean and intact
6. Steering & Suspension
- No excessive play in the steering wheel
- Springs, shocks, and mounts not cracked, broken, or missing
- Steering linkage and components secure
7. Coupling & Trailer (if applicable)
- Fifth wheel locked, jaws closed around the kingpin, no gap between the fifth wheel and trailer apron
- Air and electrical lines connected, not chafing or tangled
- Landing gear fully raised and the handle secured
- Trailer doors closed and cargo secured
For the trailer side of the rig, use our trailer maintenance checklist.
Post-Trip Inspection & the DVIR
At the end of the day, the driver walks the vehicle again and notes anything that changed during the shift. Under federal rules, the post-trip report covers at least these parts and accessories:
- Service brakes, including trailer brake connections
- Parking brake
- Steering mechanism
- Lighting devices and reflectors
- Tires
- Horn
- Windshield wipers
- Rear-vision mirrors
- Coupling devices
- Wheels and rims
- Emergency equipment
Since 2014, drivers of property-carrying commercial vehicles generally don’t need to submit a DVIR when no defects are found, although many fleets still require one as a best practice. Passenger carriers must still submit a report every day. Always confirm the current requirements for your operation with FMCSA and your safety manager.
What Happens When a Defect Is Found
- The driver records the defect on the DVIR
- The carrier repairs the defect — or determines the repair isn’t needed — before the vehicle is dispatched again if it would affect safe operation
- The repair is certified on the report
- The next driver reviews and signs the report during their pre-trip
- The carrier keeps the original DVIR and certification of repairs for at least three months
This is where downtime usually happens: the defect gets written up, but the truck sits waiting for a shop slot. A mobile fleet repair team can fix many DVIR defects — lights, brakes, air leaks, tires — right in your yard, often before the next shift.
Why Daily Inspections Matter for California Fleets
Daily inspection records matter for more than roadside checks. During California’s BIT (Biennial Inspection of Terminals) program, the CHP reviews your maintenance and inspection records along with the vehicles themselves. Consistent pre-trip and post-trip reports, combined with preventive maintenance and 90-day inspections, make that review much smoother. Our California BIT 90-day checklist and DOT annual inspection checklist cover the rest of the compliance picture.
Tips for Making Inspections Stick
- Use the same checklist every time — paper or app, consistency is what catches problems
- Give drivers enough time — a rushed walkaround misses things
- Act on reports quickly — drivers stop reporting defects if nothing gets fixed
- Track repeat issues — the same defect showing up again points to a bigger problem; see our list of warning signs your truck needs service
Get DVIR Defects Fixed Without the Downtime
ADM Auto Services provides mobile fleet repair, DOT & BIT inspections, preventive maintenance, and 24-hour truck & trailer repair across the Bay Area and Central Valley. When your drivers write up a defect, we can come to your yard and get the truck back in service fast.
Need help keeping your fleet inspection-ready? Call ADM Auto Services at 510.552.4926.
Jermiah King is the founder of ADM Auto Services. A trained diesel technician, he brings deep hands-on experience from the oil field and advanced manufacturing industries, including robotics and PLC work. After relocating to California in 2017, he founded ADM Auto Services to pursue what he loves most — keeping fleets running with expert, reliable vehicle service across the Bay Area and Central Valley.
