When a mechanical failure causes truck accidents

Truck Accident - August 31, 2026 by Horwitz, Horwitz & Associates

When a mechanical failure causes a truck accident, figuring out why the part failed can reveal whether someone is legally responsible. Worn brakes, damaged tires, steering problems, and defective parts can sometimes be traced to poor maintenance, inadequate inspections, or a product defect.

A big rig is only safe when its critical components are properly manufactured, inspected, and maintained. If a truck’s mechanical failure left you injured, a mechanical failure truck accident lawyer can investigate what went wrong and whether the trucking company, a maintenance provider, a manufacturer, or another party may be liable. At Horwitz, Horwitz & Associates, a Chicago truck accident lawyer will handle the legal side while you focus on recovering.

Is a sudden breakdown really just bad luck?

A sudden breakdown isn’t necessarily anyone’s fault, but its cause is worth investigating. Maintenance records, inspection reports, the failed component itself, and other evidence may show whether the problem should have been discovered or prevented.

Trucking companies have to follow federal standards, and the people responsible for maintenance are expected to know the machinery they’re working on. Many of these rules come from the Federal Motor Carrier Safety Administration (FMCSA). Under Part 396, motor carriers must systematically inspect, repair, and maintain the commercial vehicles under their control and keep key parts in safe operating condition. These requirements are intended to keep commercial vehicles safe and can help identify worn or damaged components before they contribute to a crash.

Who can be held responsible when a truck part fails?

When a truck part fails, the responsible party isn’t always obvious, so a truck accident attorney will look at every possible point of liability. Depending on what happened, that can include:

• The trucking company, if it failed to keep up with required maintenance
• A cargo-loading company, if improperly loaded or secured cargo contributed to the mechanical failure and crash
• A maintenance crew that missed a problem it should have caught
• A driver who kept operating the truck despite warning signs of a mechanical problem
• A parts manufacturer that produced a defective part

These aren’t the only parties who might be responsible, and often more than one is. Say a trucking company failed to address worn brakes while a separate loading company improperly loaded the cargo. On a hill, the cargo shifts, the driver brakes hard, and the worn brakes fail. Depending on the evidence, both companies’ conduct could have contributed to the crash.

How do you prove the failure and the neglect behind it?

It comes down to evidence, and some of that evidence can be lost, altered, repaired, or become harder to obtain over time. Our team investigates early, pulling black-box data, maintenance logs, and employee records, along with anything else that shows what caused the failure, whether someone should have seen it coming, and whether everyone acted reasonably.

When the case is based on negligence, you generally have to show that the responsible party owed you a duty, breached that duty, and that the breach caused your injuries and resulting damages. A defective-product claim can work differently, since it doesn’t always require proving that anyone was careless.

What happens when everyone blames everyone else?

Truck accidents are expensive, so the insurance companies involved will often try to limit what they pay by pushing blame onto everyone else, including you. Illinois handles this with a modified comparative fault rule, sometimes called the 50% rule.

What that means for you is simple: you can still recover compensation as long as you’re found no more than 50% at fault for the crash. Your damages are then reduced by your share of the blame. When several parties are at fault, each role has to be examined carefully. If a trucking company’s poor maintenance and a loading company’s bad cargo both contributed to the wreck, both may face liability.

Horwitz, Horwitz & Associates knows where truck cases hide the truth

Truck accident cases get complicated fast, with heavy property damage and steep medical bills on top of the injury itself. The trucking company and its insurer may begin investigating soon after a serious crash, and important physical and electronic evidence can change or become harder to obtain over time. Starting an investigation early can help preserve evidence about what went wrong.

When you call Horwitz, Horwitz & Associates, we move quickly to protect evidence, investigate the cause, and defend your right to compensation. Give us a call at (800) 985-1819 or reach out online to schedule a free case consultation and learn about your legal options.