California product liability law lets someone injured by a defective product sue the manufacturer, distributor, and retailer under a strict liability rule, meaning you do not have to prove anyone was careless. You only have to prove the product was defective, that the defect existed when it left the defendant’s hands, and that the defect was a substantial factor in causing your injury. That framework applies to cars, tools, drugs, medical devices, toys, appliances, and virtually every other product sold in the state, and it reaches every business that helped bring the item to market.
What Strict Liability Means for Your Case
Strict liability is the reason California is considered one of the friendlier states for people hurt by defective products. In an ordinary negligence case, you have to show the defendant did something unreasonable. Here, you don’t. The focus is on the product, not the defendant’s conduct.
Three elements do the work: the product had a defect, the defect was present when the defendant sold or released it, and the defect substantially caused your injury. California also rejects the requirement found in many other states that a plaintiff prove the defect made the product “unreasonably dangerous.” The California Supreme Court eliminated that hurdle in Cronin v. J.B.E. Olson Corp., holding it would impose a heavier burden than strict liability was meant to carry.1Justia. Cronin v. J.B.E. Olson Corp. Defect plus causation is enough.
The Three Kinds of Defect
Which type of defect you’re claiming shapes what you have to prove. California recognizes three, and cases often involve more than one.
Design Defects
A design defect exists when the product’s blueprint itself is unsafe, so every unit that leaves the factory carries the same hazard. California gives you two tests to choose from, and you can rely on either or both.
The consumer expectation test asks whether the product performed as safely as an ordinary consumer would expect when used in a reasonably foreseeable way.2Justia. CACI No. 1203 – Strict Liability – Design Defect – Consumer Expectation Test – Essential Factual Elements It works well for products whose safe use is a matter of everyday experience.
The risk-benefit test flips the burden. Once you show the design caused your injury, the manufacturer has to prove the design’s benefits outweigh its risks, considering factors like whether a safer alternative was feasible.3Justia. CACI No. 1204 – Strict Liability – Design Defect – Risk-Benefit Test – Essential Factual Elements – Shifting Burden of Proof The California Supreme Court set up this dual framework in Barker v. Lull Engineering Co.4Justia. Barker v. Lull Engineering Co., 20 Cal. 3d 413
Manufacturing Defects
A manufacturing defect is a one-off. The design was fine; a particular unit came out wrong. A cracked brake pad in an otherwise sound batch. A contaminated jar in an otherwise clean production run. You need to show the defect existed when the product left the defendant’s control and was a substantial factor in the injury.1Justia. Cronin v. J.B.E. Olson Corp. Because the manufacturer’s own specifications set the benchmark, these cases are often more straightforward than design cases.
Failure to Warn
A product can be well designed and correctly made and still be defective because it lacked adequate warnings. To win a failure-to-warn claim you have to show the product carried risks that were known or reasonably knowable given the scientific knowledge at the time, that those risks were a substantial danger during foreseeable use, and that the warnings given were inadequate.5Justia. CACI No. 1205 – Strict Liability – Failure to Warn
The knowledge element is what makes these cases harder. In Anderson v. Owens-Corning Fiberglas Corp., the California Supreme Court held that knowability is a necessary part of strict liability for failure to warn, and manufacturers can defend by showing the risk was not scientifically known or knowable when the product was sold.6Justia. Anderson v. Owens-Corning Fiberglas Corp. For prescription drugs and medical devices, the warning obligation usually runs to the prescribing physician rather than the patient.
Who You Can Sue
You are not limited to the company that built the product. Strict liability reaches everyone in the chain that put the product on the market: original manufacturer, component makers, assemblers, wholesalers, distributors, importers, and retailers. The reasoning is that all of them benefited from the sale and are better positioned than an injured consumer to absorb the cost.
That principle now covers online marketplaces. In Bolger v. Amazon.com, a California Court of Appeal held Amazon could be strictly liable for a defective product sold by a third-party seller on its platform, finding Amazon was an integral part of the distribution enterprise, took a direct financial cut of the sale, and controlled substantial parts of the transaction.7Justia. Bolger v. Amazon.com, LLC A second appellate court reached the same result in Loomis v. Amazon.com, rejecting the argument that Amazon was merely a service provider and noting that lacking title or physical possession did not automatically shield it.8Justia. Loomis v. Amazon.com LLC This matters most when the actual seller is overseas and effectively unreachable.
What the Defense Will Argue
Even in a strong case, expect the other side to push back on several fronts.
Comparative fault. If your own carelessness contributed to the injury, the jury can reduce your recovery by your share of fault. California uses pure comparative fault, so even a plaintiff found 90% at fault can still collect 10% of the damages.
Product misuse. A manufacturer is not liable for injuries caused by truly unforeseeable misuse. The word doing all the work is “unforeseeable.” Manufacturers are expected to anticipate that people will use products in ways not strictly intended and either design around those uses or warn about them.
Assumption of risk. This requires the defendant to prove you actually knew about the specific danger and voluntarily chose to face it anyway. Because consumers rarely have detailed advance knowledge of a defect, this defense rarely succeeds.
Federal preemption. This is the one that can end a case before the facts of the injury are even discussed. In Riegel v. Medtronic, Inc., the U.S. Supreme Court held that the Medical Device Amendments’ preemption clause blocks state common-law claims challenging the safety of a device sold in an FDA-approved form.9Justia. Riegel v. Medtronic, Inc. – 552 U.S. 312 (2008) Claims can survive only where the state duty parallels an FDA requirement rather than adding to it. Generic drug manufacturers get similar broad protection because federal law forces their labels to match the brand-name version, so they cannot be sued in state court for inadequate labeling. Brand-name drugs face a narrower preemption zone. If your injury involves an FDA-approved device or a generic drug, get a lawyer to assess viability before assuming a claim exists.
What You Can Recover
A successful claim can produce three kinds of damages.
Economic Damages
These cover verifiable monetary losses: past and future medical expenses, lost earnings and lost earning capacity, property damage, substitute domestic services, and burial costs in a wrongful death case.10California Legislative Information. California Civil Code 1431.2 – Several Liability for Non-Economic Damages When multiple defendants are liable, they are jointly and severally liable for economic damages, which means you can collect the whole amount from any one of them.
Non-Economic Damages
Non-economic damages cover pain and suffering, emotional distress, loss of companionship, and diminished quality of life. California does not cap them in product liability cases. But under Proposition 51, codified at Civil Code Section 1431.2, each defendant is only severally liable for non-economic damages, meaning each pays only its own percentage share of fault rather than the full amount.10California Legislative Information. California Civil Code 1431.2 – Several Liability for Non-Economic Damages The split between joint liability for economic damages and several-only liability for non-economic damages catches many plaintiffs off guard and shapes decisions about which defendants to pursue.
Punitive Damages
Punitive damages require clear and convincing evidence that the defendant acted with oppression, fraud, or malice. California defines malice as conduct intended to cause injury or despicable conduct carried out with willful and conscious disregard for the safety of others.11California Legislative Information. California Civil Code 3294 – Punitive Damages In product cases that usually means proof the manufacturer knew about the danger and sold the product anyway, or actively hid evidence of harm. A design that simply turned out to be flawed is not enough.
How Long You Have to File
You have two years from the date of injury to file a personal injury or wrongful death product liability claim in California, under Code of Civil Procedure Section 335.1.12California Courts. Deadlines to Sue Someone – Statute of Limitations Miss it and the court will dismiss the case regardless of the merits.
The clock does not always start on the day the product hurt you. California’s discovery rule delays the start of the limitations period when you did not know, and had no reason to suspect, that you had been harmed by someone’s wrongful conduct. The two years begins when you discover or reasonably should have discovered both the injury and its likely connection to the product.13Justia. CACI No. 455 – Statute of Limitations – Delayed Discovery That matters most in latent injury cases such as toxic exposures or slowly failing medical implants, where symptoms may not appear for years. Once you have reason to suspect an injury and a wrongful cause, the duty to investigate begins and the clock starts running. If you think you have a claim, count backward from today and get the case evaluated well before that two-year mark.