10 Tips to Pass Your Next DOT Inspection

Staying compliant with Department of Transportation (DOT) regulations isn’t just about avoiding fines—it’s about safety, reliability, and keeping your fleet on the road. Below, we’ve compiled ten professional, actionable tips that can make the difference between a violation and a clean bill of health.

Tip 1: Know the DOT Inspection Levels

DOT inspections are classified into several levels, but Level I (North American Standard Inspection) is the most thorough. This includes a 37-step procedure examining the vehicle and driver. Know what inspectors are looking for:

• Driver credentials and logs
• Brake system
• Suspension
• Tires and wheels
• Lighting devices
• Coupling devices

Be ready for anything by understanding what each level entails, especially if you’re running long hauls across state lines.

Tip 2: Pre-Trip Inspections Are Non-Negotiable

A thorough pre-trip inspection is your first line of defense. This daily check should include:

• Brake functionality and air pressure levels
• Tire pressure and tread depth
• Lighting systems
• Windshield wipers
• Mirrors and reflective devices

Make it part of your daily routine. A few extra minutes can prevent costly penalties—or worse, a breakdown.

Tip 3: Maintain Your Brake System Religiously

Brake violations are one of the top reasons trucks fail inspections. Make sure your:

• Air compressor is operating properly
• Slack adjusters are correctly adjusted
• Brake shoes have enough friction material
• Drums are free of cracks or contamination

If your vehicle is equipped with air brakes, check for leaks in the air lines and ensure air tanks are properly drained of moisture daily.

Tip 4: Keep Your Lights in Working Order

Non-functioning lights are an immediate red flag. Inspect your:

• Headlights
• Brake lights
• Turn signals
• Clearance and marker lights

Tip 5: Check Tire Health and Inflation

DOT inspectors will assess tires closely. Ensure:

• No sidewall bulges or cuts
• Minimum tread depth of 4/32” on steer tires and 2/32” on others
• No mismatched or improperly inflated tires
• Dual tires are not touching

Keep a tire gauge handy and check inflation before every trip.

Tip 6: Make Sure Your Load is Secure

Improperly secured cargo can result in Out-of-Service violations. Inspect:

• Straps, chains, and binders for damage
• Anchor points for corrosion or cracks
• Tarps for tears or weak spots

Tip 7: Keep Your Driver Qualification Files Up to Date

DOT inspectors may request driver files at any time. Ensure your:

• Medical certificates are current
• CDL endorsements are accurate
• Hours of service logs are complete and compliant
• Driver’s license is valid and accessible

A disorganized or incomplete file can trigger deeper scrutiny.

Tip 8: Stay on Top of Preventive Maintenance

Regular maintenance is your long-term insurance policy. Focus on:

• Engine oil and coolant levels
• Transmission fluid and differential gear oil
• Suspension components, including leaf springs and air bags
• Wheel bearings and axle seals

Tip 9: Clean Up the Cab and Exterior

Presentation matters. A dirty or cluttered cab can signal negligence. Keep:

• The dashboard clear and paperwork organized
• The exterior free from excessive grease, oil, or debris
• The license plates clean and visible

Tip 10: Keep Your ELD and HOS Records Audit-Ready

Electronic Logging Devices (ELDs) and Hours of Service (HOS) compliance are a growing focus in roadside inspections. Ensure:

• Your ELD is functioning properly and synced
• Drivers can demonstrate how to use it
• Backup records are available in the event of an ELD malfunction
• Logs are free from falsification or missing segments

Secure Your DOT Success Now

Passing a DOT inspection is about consistency and attention to detail. From the cab to the axle, every inch of your vehicle must meet regulatory standards. Build inspection readiness into your daily routine and reinforce a culture of safety within your fleet.

When the rubber meets the road, preparation is your best defense. Need help implementing a maintenance schedule or training your team? Don’t wait for violations to pile up—reach out to Legacy Auto & Fleet today.