Who's Liable for a Truck Accident Caused by a Brake Failure?

 Posted on May 29, 2026 in Truck Accidents

Commercial trucks must have consistent maintenance check-ups, including on their braking systems. These check-ups don’t always happen, though. During a Brake Safety Week conducted by the Commercial Vehicle Safety Alliance, 12.6 percent of commercial trucks inspected were pulled off the road for brake violations.

When brakes fail and cause an accident, it’s often due to someone up the chain not making sure the brakes were in good working order. If you've been injured in a truck accident in 2026, a Chicago, IL truck accident lawyer can help identify who is responsible and what your claim is worth.

Why Are Truck Brake Failures So Dangerous?

A fully loaded commercial truck can weigh up to 80,000 pounds. Brake failure at speed means that the truck collides with other vehicles or objects with massive force. The results are often severe.

Brake failures are unlike other accidents. They don’t stem from driver error or spontaneous circumstances. Rather, they come from wear and tear on equipment, or else faulty equipment. This is why federal regulations have strict guidelines for brake maintenance.

What Are Federal Regulations for Truck Brakes?

Under 49 CFR 393.40, every commercial motor vehicle must be equipped with functioning brake systems. These systems must meet federal safety standards. Brakes must act on all wheels and be capable of stopping the vehicle within specified distances under normal conditions.

Other laws require ongoing systematic inspection and maintenance of all brake components. Components may include actuators, slack adjusters, linings, pads, drums, and rotors. Records must be kept of this maintenance. This can be valuable evidence in the event of an accident.

Who Can Be Liable When Brake Failure Causes an Accident in Illinois?

Liability in a truck brake failure case often involves more than one party.

The Trucking Company

Trucking companies are required under 49 CFR 396.3 to inspect, repair, and maintain all vehicles subject to their control. Parts must be in safe operating condition at all times. Records of inspections and repairs must be kept. If a brake had a defect and the company failed to identify or fix it during routine maintenance, the company is often responsible.

The Driver

Commercial truck drivers are required by law to conduct pre-trip and post-trip inspections. These inspections include checking brake function, air pressure, and visible brake components. If a driver notices warning signs and fails to report them or continues driving, they can share liability for the resulting accident. Warning signs of brake failure might include reduced stopping power, unusual noises, or warning lights.

A Third-Party Maintenance Company

Many trucking companies outsource vehicle maintenance to third-party shops. If the brakes were recently serviced and failed due to improper repair or installation, the maintenance provider can be held liable.

The Brake Manufacturer

If the brake components themselves were defective, the manufacturer may also be liable. "Defective" means they failed under normal operating conditions despite proper installation and maintenance. These cases need a technical analysis of the failed components.

If the brake manufacturer played a part in the brake failure, a separate product liability suit can be filed.

What Evidence Is Most Important in an Illinois Truck Brake Failure Case?

The maintenance records are often one of the most important pieces of evidence. Driver inspection logs are also key evidence. Semi trucks are also equipped with electronic logging devices that track things like driving hours. These can be helpful in showing how the wreck played out.

Other key evidence includes:

• Maintenance and inspection logs

• The truck's electronic control module data

• Post-crash inspection reports

• The physical brake components themselves

An independent analysis of the failed brake system can establish whether the failure resulted from neglect, improper repair, or a defective part. This determines which parties bear responsibility.

Trucking companies will keep records for a period of time. To make sure they're not erased, though, your attorney can send a spoliation letter. This will ensure that the company preserves relevant evidence.

Call a Chicago, IL Truck Accident Lawyer Today

Truck brake failure cases can get complicated quickly. The mixed liability means that these cases benefit significantly from an experienced personal injury attorney. Winters Salzetta O'Brien & Richardson, LLC has recovered millions of dollars in compensation for clients with personal injury cases. Call our Chicago, IL truck accident attorneys at 312-236-6324 to schedule your free consultation today.