DOT Inspections: What Really Gets Drivers in Trouble
Truck driver is waiting for DOT inspection
Every truck driver knows the tension of a DOT (Department of Transportation) inspection. You could be cruising down the highway, and suddenly — flashing lights, a pull-over, and a full inspection. What follows could be a minor delay or a serious hit to your CSA (Compliance, Safety, Accountability) score. And the truth is, it’s not always catastrophic problems that cause issues. Often, it’s the small, preventable things that get drivers sidelined.
This guide breaks down the most common DOT inspection violations and how to avoid them — not with fear, but with preparation.
1. Lighting Violations
A cracked lens, a missing reflector, or a non-functioning taillight might seem minor, but these are some of the most frequently cited violations. Lighting issues consistently rank in the top three DOT inspection failures according to data from the Commercial Vehicle Safety Alliance (CVSA) and Federal Motor Carrier Safety Administration.
What to do:
Perform a thorough walk-around pre-trip inspection.
Check all lights including brake lights, signal lights, license plate lights, and reflectors.
Replace bulbs immediately when they go out — don’t wait until your next stop.
2. Tire Tread and Inflation Problems
Worn-out or improperly inflated tires are another common reason for a failed inspection. Tires below the legal tread depth can result in citations, fines, and immediate out-of-service orders.
What to do:
Maintain at least 4/32" tread depth on steer tires and 2/32" on all other tires.
Use a tread depth gauge regularly.
Check for uneven wear, exposed belts, or embedded objects.
Learn more about proper tire standards on the FMCSA Tire Safety Page.
3. Brake System Issues
Brake violations are among the most dangerous and costly. Whether it’s an air leak, out-of-adjustment slack adjusters, or worn pads, these issues are red flags for inspectors.
What to do:
Conduct a thorough brake test before hitting the road.
Listen for air leaks and inspect air hoses and lines.
Don’t ignore pulling, squeaking, or grinding sensations.
You can find a helpful brake inspection checklist from the CVSA.
4. Fluid Leaks
Even minor leaks can be flagged as hazardous, especially fuel, oil, or coolant leaks that might drip onto the roadway or engine components.
What to do:
Check beneath your truck regularly for puddles or drips.
Monitor your fluid levels and top them off properly.
Look for damp or shiny spots around gaskets and seals.
5. Loose or Missing Parts
This includes things like unsecured battery boxes, missing exhaust brackets, or loose air tanks. Inspectors will flag anything that looks like it might fall off or pose a safety risk.
What to do:
Inspect your undercarriage and mounting brackets weekly.
Replace missing hardware and tighten anything that shifts or rattles.
Use locknuts or threadlocker where vibration is constant.
6. Logbook and ELD Violations
This one isn’t about the truck itself — but it’s one of the most common violations during roadside checks. Inaccurate logs, missing documents, or malfunctioning ELD systems are all red flags.
What to do:
Double-check your logs for accuracy.
Make sure your ELD is synced and functional.
Carry backup copies of required documents.
Review ELD rules and requirements on the FMCSA ELD FAQ page.
Stay Inspection-Ready with Confidence
DOT inspections can feel unpredictable, but the most common violations are often 100% preventable. Staying ahead of issues with regular inspections, preventive maintenance, and smart scheduling saves you time, money, and stress.
Whether you're running solo or managing a fleet, our team at Sounders Truck Repair is here to keep your rig ready for the road. Let’s keep your CSA score clean, your wheels turning, and the DOT off your back.
Book your next inspection or maintenance service now Our Services — Sounders Truck Repair or call us directly. We’re here to help you stay compliant — and keep moving.