Who is at Fault When a Semi-Truck Suddenly Swerves Due to Steering Failure?
You are driving in the fast lane, safely passing a fully loaded 18-wheeler. Without warning, the massive truck violently jerks out of its lane, sideswiping your vehicle and sending you spinning into the concrete median. When the police arrive, the pale and shaken truck driver insists they did not fall asleep or get distracted. Instead, they claim the steering wheel suddenly "went dead" or locked up, making it physically impossible to control the truck.
Mechanical failure is a common defense tactic used by trucking companies to avoid liability. They argue that a sudden steering failure is an unforeseeable "Act of God" for which they cannot be blamed. However, in the world of commercial trucking, parts almost never fail without warning. Figuring out who is at fault when a semi-truck suddenly swerves due to steering failure requires an aggressive investigation into the maintenance department's deferred repairs and the driver's ignored warning signs.
A semi-truck's steering system is incredibly complex, relying on heavy-duty power steering pumps, gearboxes, tie rods, drag links, and kingpins. The sheer weight of an 80,000-pound truck puts immense stress on these components. The most common catastrophic failure is a snapped tie rod or a failed steering gear box. When this happens at 65 mph, the front tires instantly lose alignment, causing the truck to violently pull to one side, completely overpowering the driver's physical ability to keep the vehicle straight.
Exposing Maintenance Negligence
A steering component doesn't just snap out of nowhere. It groans, vibrates, leaks, and rusts for months before it finally breaks. A specialized attorney will tear apart the company's maintenance logs to prove the failure was highly foreseeable:
Drivers are required to submit daily reports detailing any issues with the truck. If an attorney uncovers weeks of reports where the driver complained of "loose steering," "excessive play in the wheel," or "fluid leaking from the steering box," and the mechanics signed off on the truck without actually fixing it to keep it on the road, the company is directly liable for gross negligence.
Heavy-duty steering joints require frequent, specialized greasing to prevent metal-on-metal friction. Over time, unlubricated joints heat up, grind down, and eventually shear off completely. Mechanical experts can examine the broken tie rod post-crash; if it is bone dry and packed with rust rather than fresh grease, it is undeniable proof of a neglected maintenance program.
If the trucking company's maintenance logs are pristine and the truck was brand new, the attorney will pivot and file a product liability lawsuit against the manufacturer of the steering component (e.g., Freightliner, Peterbilt, or a third-party parts supplier), arguing the part was defectively designed or manufactured.
Preserving the Wreckage is Critical
In mechanical failure cases, the physical truck is the most important piece of evidence. If the trucking company is allowed to repair the truck or scrap the broken steering parts before the plaintiff's experts can examine them (a process known as "spoliation of evidence"), the case becomes incredibly difficult to win.