Frequently Missed DOT Inspection Points

DOT inspections are not optional; they’re required. Whether you're rolling through a random roadside check or driving into a scheduled annual review, even a single missed point can shut your truck down or hit you with fines. What’s worse? Some violations are small, preventable points that operators often overlook.  

To keep you from being caught unawares, we thought it would be helpful to break down the most commonly missed DOT inspection points. These eight points are easy to keep track of if you build them into your pre-trip inspections. 

Brake System Deficiencies

It might be surprising, but brake issues consistently rank as the top out-of-service violation. While we’re not discussing complete brake failure, it's essential to note that the little things do matter when it comes to DOT inspections. Small things getting overlooked can lead to big problems.

What inspectors catch:

• Air leaks in lines or chambers
• Low air pressure in the system
• Worn brake linings
• Slack adjusters are out of spec
• Drums that are cracked or contaminated with oil

To stay compliant, checking your brakes can be the difference between a pass or fail. Even a minor air leak can render your rig inoperable. Be sure you are testing the system daily, checking pushrod travel, and listening for hissing sounds when brakes are applied.

Lights and Reflectors

Next up on the list of inspection points is lighting. Lighting violations are one of the fastest ways to get dinged. They're easy to spot during a walkaround and just as easy to miss if you're not paying attention.

What inspectors check:

• Brake lights
• Turn signals
• Clearance lights
• Reflectors
• License plate lights

Many lighting issues come from bad grounds, corroded connectors, or pinched wires. Before you set out on any trip, be sure to incorporate a quick light check. Trust us, you don’t want to skip it.

Tires and Tread Depth

Tire condition is one of the first things an inspector looks at. If your tires are out of spec, unevenly worn, or improperly inflated, that's a violation.

Watch for:

• Tread depth under 4/32 inch on steer tires
• Tread depth under 2/32 inch on other tires
• Flat spots, bulges, or exposed belts
• Dual tires touching
• Mismatched sizes or sidewall damage

Checking your tire tread is simple with a gauge. You can get accurate readings that way, which are a lot more useful than relying on visual checks. And while you’re checking the tread, also make sure to inspect the inside-facing sidewalls.

Load Securement

Let’s face it, your load needs to be secure, no matter the size. Loose or improperly secured cargo can lead to serious accidents. And yet, it's one of the most overlooked areas during inspections, especially on flatbeds and open trailers.

Inspectors focus on:

• Straps or chains that are worn or frayed
• Missing edge protectors
• Insufficient tie-downs
• Loose anchor points or winches

As part of your inspection checklist, check that all load securement devices are tight, undamaged, and rated for the load. Each piece of cargo requires the correct number of tie-downs, based on its weight and length.

Suspension System Wear

Suspension components can wear gradually, which makes them easy to miss during quick walkarounds. However, DOT inspectors scrutinize this system closely.

Common failures include:

• Broken leaf springs
• Cracked hangers
• Loose U-bolts
• Leaking or damaged airbags

Because your rig’s suspension wears out slowly, regular inspections will keep you ahead of any issues that may arise. Keep an eye out for missing or broken parts and check for signs of shifting or uneven ride height. Air leaks in the system are a red flag.

Windshield and Wipers

A cracked windshield isn’t a big deal, right? Wrong. A cracked windshield is enough to land a violation if it obstructs the driver's view.

Inspectors check for:

• Cracks or chips in the driver's line of sight
• Worn or non-functional wipers
• Empty washer fluid reservoirs

When even a missing wiper blade can result in a citation, you’re going to want to keep an eye on your windshield and wipers. Refill washer fluid often and test your wipers before hitting the road.

Emergency Equipment

The funny thing about emergency gear is that it’s easy to forget until you need it. So, when you’re asked to show it for your DOT inspection, scrambling to find it or remember what’s in it if it’s fully stocked, is not a position you want to be in. Emergency kits are part of every Level 1 inspection, so ensure yours has everything you need. 

Required items:

• Three reflective triangles
• A working fire extinguisher (fully charged and accessible)
• Spare fuses (unless circuit breakers are used)

Keep this gear organized and secured in the cab or trailer compartment. Be sure to check the expiration dates as well. 

Driver Documentation

We get it, no one likes paperwork. Unless you’re running through a checklist and can catch missing paperwork, even if your truck is in perfect shape, your logs and documents can bring everything to a halt.

Common mistakes:

• Outdated registration or insurance
• Missing medical card
• Logbook violations or ELD malfunctions
• No proof of annual inspection

Before heading out for the day, ensure that all driver credentials and inspection records are up to date and easily accessible. Consider this: if it takes you 10 minutes to find them, you're not ready for an inspection. 

Passing DOT Inspections Every Time

Surprisingly, most DOT violations don't stem from massive breakdowns. They come from missed details. It could be loose straps, low tread, faded reflectors, or a cracked windshield – no matter what it is, you’ll want to keep a close eye on them. If you're an operator or managing a fleet in Ronkonkoma, catching these issues early keeps trucks legal, loads on time, and drivers safe. For everything else DOT inspection-related, K&M Truck Repair is here to help you avoid fines, stress, and non-compliance. 

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