Products liability is the area of law that holds manufacturers, distributors, retailers, and others in the supply chain responsible for injuries caused by defective products. Unlike negligence claims that require proving the defendant was careless, products liability often applies strict liability — the manufacturer is responsible if the product was defective and the defect caused injury, regardless of how much care the manufacturer exercised in designing and making the product. This strict liability framework reflects a policy judgment that those who profit from placing products in commerce should bear the cost of injuries those products cause when they are defective.
The Three Types of Product Defects
Products liability recognizes three distinct defect theories. Design defects exist when the product’s design is inherently dangerous or flawed — every unit of the product, made exactly as designed, is unsafe. The legal test typically applied is whether a reasonable alternative design existed that would have reduced the risk without substantially impairing the product’s utility and marketability. An SUV with a center of gravity too high for its wheelbase that causes rollover accidents has a design defect affecting every vehicle of that model, not just one bad manufacturing run.
Manufacturing defects occur when a specific unit of the product deviates from the manufacturer’s own design specifications — a tire with inadequate bonding between the tread and the body, a pharmaceutical product contaminated during production, a vehicle with a faulty weld. The design itself may be sound, but this particular product was made incorrectly. Manufacturing defect cases typically require expert analysis comparing the allegedly defective product against the manufacturer’s specifications and other units to establish the deviation.
Failure to warn defects occur when a product carries risks that are not obvious to a reasonable user and the manufacturer failed to provide adequate warnings or instructions about those risks. A medication with known side effects that are not disclosed in labeling, a power tool with non-obvious danger when used in a particular way without appropriate warning, or a chemical product with specific storage and disposal requirements that are not communicated — these are failure to warn cases. The warning must be adequate in content and prominence; a warning buried in fine print or expressed in technical language inaccessible to the ordinary user may be found inadequate.
What Makes These Cases Challenging
Products liability cases require substantial upfront investment in expert analysis. A mechanical engineer or human factors expert to analyze the defective product, an accident reconstruction expert to establish causation, and medical experts to link the injury to the product failure are typically required minimum experts in a complex products case. Preserving the defective product — the physical evidence of the defect — is critical; a tire that blew out, a medical device that failed, a vehicle component that malfunctioned must be preserved for expert examination and potentially presented as evidence. Products liability cases can also involve numerous potential defendants — the manufacturer of the finished product, the manufacturer of component parts, the distributor, and the retailer — requiring investigation of the full supply chain to identify all potentially liable parties.