If a defective product injured you in California, you may have a product liability claim even if no one involved was careless. California holds everyone in a product’s chain of distribution (the manufacturer, the component maker, the distributor, and the retailer) strictly liable when a defect causes injury. That means you generally do not have to prove negligence. You have to prove the product was defective and that the defect caused your harm.
This page explains the three ways a product can be defective under California law, who can be held responsible, what happens when a company learns of a danger only after the sale, what these cases require, and the deadlines that apply. It is general information, not legal advice.
California pioneered strict product liability for defective products (Greenman v. Yuba Power Products, Inc. (1963) 59 Cal.2d 57). Under strict liability, the central question is not whether the company acted reasonably. It is whether the product was defective.
A strict-liability product claim in California generally requires proof of four things:
Because carelessness is not the issue, a company that followed every internal procedure can still be liable if the product that reached you was defective.
California recognizes three distinct defect theories. A single case can involve more than one.
1. Manufacturing defects
A manufacturing defect means a particular unit came off the line different from its intended design, and less safe because of it: a weld that breaks, a batch contaminated during production, a missing fastener. The comparison is against other units of the same product, not against the design itself.
2. Design defects
A design defect means the entire product line is unsafe as designed, even when every unit is built exactly as specified. California gives plaintiffs two alternative ways to prove a design defect, established in Barker v. Lull Engineering Co. (1978) 20 Cal.3d 413:
The two tests are alternative routes to the same conclusion. A product can fail either one and be found defective. This is the test most often used for complex products such as machinery, medical devices, and vehicle safety systems, where expert testimony about alternative designs is usually necessary.
3. Failure to warn
A product can be well designed and perfectly manufactured yet still be defective because it lacked adequate warnings or instructions about foreseeable dangers. Warning claims focus on what the company knew or should have known and what it told users (Webb v. Special Electric Co., Inc. (2016) 63 Cal.4th 167). Pharmaceutical cases are notoriously fought on this ground: whether the label gave physicians and patients a fair picture of the side effects.
Liability reaches across the entire chain of distribution: the manufacturer, the maker of a defective component part, the wholesaler or distributor, and the retail store that sold the product. An injured consumer can pursue any of them. A retailer that simply sold a sealed box can still be strictly liable.
Multiple defendants are common. A lithium-ion battery fire, for example, can implicate the cell manufacturer, the company that assembled the device, the importer, and the retailer. Identifying every party in the chain matters, because each one is a potential source of recovery and each one holds different evidence.
A manufacturer’s responsibility does not end the day the product ships. When post-sale experience, incident reports, warranty claims, or new testing put a company on notice that its product is dangerously defective, the failure to recall or retrofit the product can be negligence in its own right, separate from whether the design was defective when it was sold. (See Hernandez v. Badger Construction Equipment Co. (1994) 28 Cal.App.4th 1791, 1827; Lunghi v. Clark Equipment Co. (1984) 153 Cal.App.3d 485, 494.)
A federal court applying California law described the trigger this way: a manufacturer may be liable when either a shift in industry standards or post-sale knowledge puts it on notice of a dangerous product defect. (Roberts v. Electrolux Home Products, Inc., 2013 WL 7753579, at *13 (C.D. Cal. Mar. 4, 2013).) In practice, that means the company’s internal complaint files, warranty data, and post-sale testing often become central evidence.
Two cautions round out the picture. A well-executed recall can cut off certain claims, because the manufacturer confronted the danger. (See Winzler v. Toyota Motor Sales U.S.A., Inc. (9th Cir. 2012) 681 F.3d 1208.) But merely mailing a notice is not always enough. California courts have held that a manufacturer cannot delegate responsibility for the safety of its product to dealers, much less to purchasers. (Springmeyer v. Ford Motor Co. (1998) 60 Cal.App.4th 1541, 1562-1563.)
The practical takeaway: what the company knew, when it knew it, and what it did about it are questions we investigate in every product case. A product that was never recalled can still support a claim, and a product that was recalled can still support one if the recall came too late or did too little.
Defective product cases are typically very complex and very expensive. Proving a defect usually requires hiring experts, often engineers to study the product’s design, and sometimes medical experts to connect the defect to the injury. The most common cases involve machinery, vehicles, and medical devices. Pharmaceuticals are frequently targeted over allegedly insufficient warnings of side effects.
Our experience with product cases includes pharmaceutical drugs, medical devices, on-road and off-road vehicles, forklifts, machinery, and even shopping carts. Each category demands its own experts and its own investigation plan, which is why these cases should be evaluated by counsel with product-liability experience. We have secured significant results for clients in complex brain injury, burn injury, and wrongful death cases arising from defective products, as well as trucking accidents involving equipment failures.
The single most important step is also the most urgent: do not lose, repair, alter, or discard the product. Too often the product is lost or repaired before it is adequately examined, and when that happens a defect can become extremely difficult to prove. If you believe a product injured you, work through this checklist as soon as you can:
In general, California gives you two years from the date of injury to file a personal injury lawsuit (Code of Civil Procedure section 335.1). If the deadline passes, you generally lose the right to sue. Learn more about how long your case will take.
There is a narrow exception worth knowing about: under the delayed-discovery rule, the clock may not start until you discovered, or reasonably should have discovered, both the injury and its connection to the product (see Fox v. Ethicon Endo-Surgery, Inc. (2005) 35 Cal.4th 797). But discovery-rule arguments are heavily litigated and turn on the specific facts; they are not a planning strategy. Evidence degrades whether or not the deadline is extended, so the safest course is to speak with an attorney promptly.
No. California applies strict liability to defective products. You generally need to show the product was defective and the defect caused your injury, not that anyone was careless. Negligence and warranty claims can also be brought alongside a strict-liability claim, depending on the facts.
Yes. A recall is not a prerequisite to a product liability claim. Recalls can be useful evidence, but many valid claims involve products that were never recalled.
The question is whether your use was reasonably foreseeable, and foreseeable misuse counts. Misuse can affect how fault is allocated, but it does not automatically bar a claim.
Developing one of these cases is expensive. Experts, testing, and investigation add up quickly, which is one reason the other side takes them seriously. Personal injury firms, including ours, typically handle product cases on a contingency fee, meaning no attorney’s fee is owed unless there is a recovery. Learn more about how much your case will cost. The specifics depend on the case, and we will explain them before you sign anything.
If you or a family member was injured by a product you believe was defective, contact us for a free consultation. We will evaluate what happened, explain your options in plain language and, if the product is still available, help you protect the evidence before it disappears.