Products Liability (Negligence)
What is the Products Liability (Negligence)?
A manufacturer or seller who fails to exercise reasonable care in designing, manufacturing, or warning about a product can be held liable in negligence for injuries caused by that failure.
Definition
Products liability based on negligence is the traditional tort theory for holding manufacturers and sellers accountable for product-related injuries. Unlike strict liability, the plaintiff must prove that the defendant failed to exercise reasonable care at some point in the product's creation, from design through manufacturing, testing, inspection, and warnings. The landmark case MacPherson v. Buick Motor Co. eliminated the privity requirement, allowing injured consumers to sue manufacturers directly in negligence even without a contractual relationship.
The negligence theory applies to all stages of the product's lifecycle. A manufacturer may be negligent in designing a product that poses unreasonable risks, in failing to maintain adequate quality control during manufacturing, in failing to inspect or test the product for safety, or in failing to provide adequate warnings or instructions. The standard of care is that of a reasonable manufacturer in the same industry, taking into account the state of the art and industry customs at the time.
Negligence-based products liability retains advantages even in jurisdictions that recognize strict products liability. It allows recovery against parties who may not qualify as commercial sellers for strict liability purposes, such as component part manufacturers or service providers. It also permits the introduction of evidence about the defendant's conduct and internal decision-making that may be excluded under strict liability. Conversely, the plaintiff's burden is heavier because they must prove the defendant's failure to exercise reasonable care, which can require expensive expert testimony and discovery into the defendant's design and manufacturing processes.
Key Elements
- 1The defendant owed a duty of care to the plaintiff as a foreseeable user or bystander
- 2The defendant breached that duty by failing to exercise reasonable care in design, manufacturing, testing, or warnings
- 3The breach was the actual and proximate cause of the plaintiff's injury
- 4The plaintiff suffered actual damages
- 5No privity of contract is required (since MacPherson v. Buick)
Landmark Cases
MacPherson v. Buick Motor Co.
217 N.Y. 382 (1916)
Judge Cardozo eliminated the privity requirement, allowing consumers to sue manufacturers directly in negligence for defective products.
Winterbottom v. Wright
10 M. & W. 109 (1842)
The case that established the privity requirement in products cases, which MacPherson later overturned.
George v. Celotex Corp.
914 F.2d 26 (2d Cir. 1990)
Applied negligence theory in a products case where the manufacturer failed to warn of asbestos dangers despite knowledge of the risks.
Exam Tips
- Always consider products liability negligence alongside strict liability — they are alternative theories and one may succeed where the other fails.
- Focus on what the defendant knew or should have known — negligence allows you to argue the defendant's awareness of the risk.
- Remember that res ipsa loquitur may apply in products cases when the defect speaks for itself and the product was in the defendant's exclusive control.
- Industry custom and state of the art are relevant but not dispositive — a manufacturer must meet the reasonable care standard even if the industry as a whole is lagging.
Common Mistakes to Avoid
- Assuming that strict liability has entirely replaced negligence in products cases — negligence remains a viable and important alternative theory.
- Forgetting that MacPherson eliminated the privity requirement — any foreseeable user or bystander can sue the manufacturer.
- Confusing the standard of care in negligence (reasonable care) with the strict liability standard (defective condition regardless of care).
Memory Aid
MacPherson opened the door: no privity required, the manufacturer owes care to all foreseeable users.