Strict Liability: Why Negligence Is Not Required

In most personal injury cases, the injured person has to prove that the responsible party was careless. They have to show that someone failed to act reasonably, and that the failure caused the harm. Product liability cases in California are different. Under the doctrine of strict liability, an injured consumer generally does not have to prove that the manufacturer was negligent at all.

California adopted strict liability for defective products in 1963, in the case of Greenman v. Yuba Power Products, Inc. The California Supreme Court held that a manufacturer is strictly liable for injuries caused by a defective product, regardless of whether the manufacturer exercised due care. The rationale was straightforward: manufacturers are in the best position to inspect and test their products, and consumers should not have to prove the specifics of a production process they cannot see.

• You do not have to prove the manufacturer was careless or negligent.
• You do not have to identify the specific error on the assembly line.
• You do have to prove the product was defective when it left the manufacturer's control.
• You do have to prove the defect caused your injury.
• You do have to show you were using the product in a reasonably foreseeable way.

Strict liability is not automatic compensation. The defect still has to be proven, and proving a defect often requires engineering analysis, expert testimony, and comparison to industry standards. If the product was substantially altered after it left the manufacturer, or if it was being used in an unforeseeable way, strict liability may not apply.

Strict liability also extends beyond the manufacturer. Under California law, any party in the chain of distribution can be held strictly liable, including component suppliers, assemblers, distributors, and retailers. The practical effect is that an injured consumer can pursue a claim against whichever entity in the chain is identifiable and reachable, without having to isolate the exact point where the defect was introduced.

Strict liability shifts the focus from the manufacturer's conduct to the product itself. That means the evidence that matters most is the product, its design, its warnings, and the circumstances of the failure, not internal company documents about quality control procedures. It is one of the reasons preserving the product after an injury is so important.

This article is general information about California law, not legal advice. Whether strict liability applies to your situation depends on the specific facts of your case.