The legal framework for defective products is the same whatever the item was: a manufacturing defect, a design defect, or a failure to warn, brought against parties in the chain of distribution. What changes with the product type is everything practical. A vehicle component case involves a different set of defendants than an appliance case. A medical device case involves the prescriber and the hospital as well as the maker. Machinery that injures someone at work brings the workers’ compensation system alongside the product claim. Food, children’s products, and recreational equipment each have their own rules attached. That is why “what product was it” is the first question any lawyer asks.
This article is organized by product type rather than by legal theory, because the theory is not usually what determines how a case runs. For the legal framework itself, see our California defective product lawyer page. To talk through a specific item, call our San Mateo office at 650-250-0705. The consultation is free.
Key Takeaways
- The three defect theories apply across all product types. What differs is who the defendants are, what evidence exists, and which other body of law overlaps.
- Component failures often involve more parties than the brand on the outside, and California’s jury instructions include a separate component parts rule.
- An injury at work does not remove a product claim against the equipment manufacturer, though the workers’ compensation system sits alongside it.
- Food, recreational equipment, and rented equipment each have their own instruction series in California.
- Whatever the category, the practical step is identical: keep the item unaltered, keep the packaging and paperwork, and record the model and serial numbers.
Why the Product Type Drives the Case
Three things change as soon as you know what the item was:
- Who the defendants are. A finished-product manufacturer, a component maker, an assembler, an installer, a distributor, a retailer, a rental company. Which of these exist depends entirely on the product.
- What records exist and who holds them. Design and testing files sit with the maker. Service and maintenance histories may sit with a dealer, an employer, or a landlord. Prescribing and implant records sit with providers.
- Which other body of law overlaps. Motor vehicle law, the workers’ compensation system, professional negligence, premises liability, or warranty and consumer statutes, depending on the category.
Vehicles and Vehicle Components
These are the most common product claims because they surface inside collisions. A restraint system, airbag, tire, brake component, steering or suspension part, or battery can fail and either cause a crash or make its consequences worse.
Likely defendants: the vehicle manufacturer, the maker of the specific component, and sometimes a dealer, a repair shop, or a parts supplier. California’s instructions include a component parts rule, which matters when the failed item was made by someone other than the company whose badge is on the vehicle.
Evidence specific to this category: the vehicle itself, which should not be repaired or released to a salvage yard; electronic data recorded by the vehicle; service and recall history; and the physical component, retained separately if it is removed.
What overlaps: the underlying collision claim. A product theory and a car accident or truck accident claim usually proceed in the same lawsuit, with the product defendants added once the component is identified. This is the category where the product angle is most often missed entirely, because attention goes to the other driver.
Medical Devices and Implants
These claims differ from other product claims in a structural way: the item reached the patient through a clinician rather than off a shelf, and the risk information was directed to that clinician.
Likely defendants: the device manufacturer, and potentially a clinician or facility if the selection, implantation, or monitoring is at issue. Those are different claims. A claim against the maker is product liability. A claim against a provider is professional negligence, which follows its own limitations rule under Code of Civil Procedure section 340.5.
Evidence specific to this category: the device identifier and lot information, the operative and implant records, the device itself if it has been explanted, and the instructions and warnings supplied to the clinician. California’s instructions include an affirmative defense concerning a manufacturer’s reliance on a knowledgeable intermediary, which is why what the company told clinicians, and when, tends to be central.
A note on limits: this article names no devices and asserts no link between any device and any medical outcome. Whether a particular product is associated with a particular harm is a medical and scientific question, and a law firm’s webpage is not a reliable source for it. Nothing here is medical advice, and no one should change or stop treatment based on it.
Household Appliances, Electronics, and Batteries
Appliances, heaters, power adapters, e-mobility devices, and the lithium-ion cells inside many of them can fail through overheating, fire, electrical fault, or mechanical failure.
Likely defendants: the finished-product maker, the cell or component manufacturer, an importer, an online marketplace or retailer, and sometimes an installer. Imported consumer electronics are the category where the manufacturer is most often overseas, which makes identifying the distributor and retailer inside California particularly important.
Evidence specific to this category: the item and any charger or accessory used with it, the purchase record and listing, the model and serial numbers, and where there has been a fire, the fire investigation report and any physical remains, which should not be cleared away.
What overlaps: property damage claims and, where the incident happened in a rental, a premises claim against a landlord.
Tools, Machinery, and Workplace Equipment
Power tools, industrial machinery, ladders, and lifting equipment produce serious injuries, and most of these injuries happen at work.
Likely defendants: the equipment manufacturer, a component maker, and potentially a company that modified, serviced, or rebuilt the machine. California’s instructions include a separate negligence instruction covering product rental, which is relevant where equipment was hired rather than owned.
The workers’ compensation overlay: an injury at work is generally handled through the workers’ compensation system as against the employer, and California’s instructions include an affirmative defense covering injuries covered by that system. That does not eliminate a claim against the manufacturer of the equipment, which is a separate party. The instruction series also includes a provision addressing an employer’s defective product. How these interact in a specific case is exactly the kind of question to raise early, because the two systems have different processes and different clocks.
Evidence specific to this category: the machine, which an employer may want back in service; guards, interlocks, and whether any had been removed or bypassed; maintenance and inspection logs; training records; and the manual and warning placards.
Children’s Products and Juvenile Equipment
Likely defendants: the manufacturer, importer, and retailer, and in some circumstances a component supplier.
Evidence specific to this category: the item with all its parts, including any straps, fasteners, or hardware; the assembly instructions as supplied; the packaging and age or weight labeling; and how the product was actually being used, since a manufacturer’s likely argument is misuse or modification. California’s instructions include an affirmative defense for product misuse or modification, and foreseeable misuse is treated differently from unforeseeable alteration.
A timing point: where the injured person is a minor, the deadline analysis is different from the ordinary adult case. That is a question for a lawyer rather than an assumption in either direction.
Food and Consumable Goods
Contamination, foreign objects, and undisclosed allergens fall here.
Likely defendants: the producer, processor, packer, distributor, and the restaurant or retailer that sold it.
What is distinctive: California’s instructions include a dedicated instruction on the implied warranty of merchantability for food, separate from the general merchantability instruction. There is also a separate instruction addressing failure to warn for products containing allergens.
Evidence specific to this category: the remaining product and its packaging, refrigerated or frozen if perishable; the receipt; the lot or batch code; any public health report; and medical records documenting the illness. Perishable evidence has the shortest life of any category, which makes speed unusually important.
Recreational and Sports Equipment
Likely defendants: the manufacturer, a retailer, and sometimes a facility operator or rental provider.
What is distinctive: California has a separate line of instructions on primary assumption of risk, addressing when coparticipants, instructors and coaches, and facility owners and operators may not be liable for risks inherent in a sport or recreational activity. Those instructions also cover exceptions to that nonliability. A defective product claim against a manufacturer is a different question from whether a risk was inherent in the activity, and the two get conflated.
Evidence specific to this category: the equipment, any protective gear worn, the rental agreement or waiver if there was one, and the maintenance history if the item belonged to a facility.
What Stays the Same in Every Category
- Keep the item, unaltered. Do not repair it, disassemble it, return it, or accept a replacement in exchange for it.
- Keep everything that came with it: packaging, labels, warnings, manual, inserts, receipt, and any registration or warranty paperwork.
- Record the identifiers: model, serial, lot or batch code, and date of manufacture if shown. Photograph the labels directly.
- Photograph the item and the scene before anything is moved, including whatever it was connected to or used with.
- Get medical attention and tell the provider what caused the injury.
- Do not give a recorded statement to the manufacturer or its insurer, and do not sign a release, before speaking with a lawyer.
- Note any recall, while understanding that products are defective whether or not one has issued, and that a recall does not by itself establish what caused a particular injury. Where a federal regulator maintains a public recall database for the category, that record is worth keeping.
Deadlines
| Situation | General rule | Source |
| Injury claims against a private party, including a manufacturer | Two years from the date of injury | Code Civ. Proc., § 335.1 |
| Claims based on a health care provider’s professional negligence | A different limitations period applies, with its own rules | Code Civ. Proc., § 340.5 |
| Claims where a public entity may be responsible | A written claim generally must be presented to the entity before any lawsuit, on a much shorter timeline | California’s Government Claims Act |
| Injuries to a minor, or warranty-based claims | Different rules apply | Worth confirming for the specific situation rather than assuming |
Defective Product Claims in San Mateo County
Our office at 15 North Ellsworth Avenue, Suite 105, San Mateo, CA 94401 works with injured people across the Peninsula. Civil cases here are handled by the Superior Court’s Civil Division at the Hall of Justice in Redwood City.
If you would rather be matched with a lawyer than choose one yourself, the State Bar of California certifies lawyer referral services and maintains a directory of certified services, including ones covering the Bay Area. Those services operate under minimum standards set by the State Bar. We mention it because it is a legitimate route that is easy to overlook, not because we have any arrangement with any of them.
More about the office is on our San Mateo page, and related explanations are collected in our California personal injury guides.
How Vaksman Khalfin Can Help
Vaksman Khalfin, PC can take custody of and preserve the item before it is lost, identify everyone in the chain of distribution for that particular product, obtain design, testing, service, and complaint records, work with the right kind of expert for the category, handle the insurers and any overlapping claim, and litigate where a fair resolution is not offered.
The firm’s California personal injury practice is led by Alan D. Khalfin, admitted in California. Product matters are handled on a contingency-fee basis: there is no upfront attorney’s fee, and attorney’s fees are owed only if there is a recovery. Case costs, which in product cases frequently include expert and testing fees, are a separate category from attorney’s fees. How case costs are handled, including whether you may be responsible for them, is set out in the written fee agreement that is reviewed with you before anything is signed.
To talk about a defective product, call 650-250-0705 or schedule a free consultation. Bring the item if you can, and photograph it before you do.
Reviewed by Alan D. Khalfin, Partner and Managing Attorney, Vaksman Khalfin, PC (admitted in California). Last reviewed: 09/22/2026
Frequently Asked Questions
A product is defective under one of three theories: a manufacturing defect, where the specific item differs from its intended design; a design defect, where the design itself is unsafe so every unit carries the same risk; or a failure to warn, where warnings or instructions were inadequate for a risk that was known or knowable. The theory does not change with the type of product, but the evidence and the likely defendants do.
Not the legal test, but almost everything else. The product type determines who the potential defendants are, what records exist and who holds them, which expert discipline is needed, and which other body of law overlaps, such as motor vehicle law, workers' compensation, professional negligence, or premises liability.
Not necessarily. Workers' compensation generally governs the claim against an employer, and California's instructions include an affirmative defense for injuries covered by that system. That is separate from a claim against the company that manufactured the equipment, which is a different party. How the two interact depends on the facts and is worth raising early.
Strict liability reaches the chain of distribution, so the finished-product manufacturer, the maker of a component part subject to the component parts rule, distributors and wholesalers, the retailer, and in some circumstances a party that leased or rented the equipment. Which of these exist depends on the product.
It adds steps rather than ending the claim. Establishing jurisdiction and completing service on a foreign company takes time. It is also the practical reason to identify the importer, distributor, and retailer, because a claim may be viable against a party inside California. This comes up most in imported consumer electronics.
Keep the remaining product and its packaging, refrigerated or frozen if it is perishable, along with the receipt and the lot or batch code. Perishable evidence has the shortest life of any product category, so this is the one where speed matters most.
Not automatically as to a manufacturer. California has a separate line of instructions on primary assumption of risk covering coparticipants, instructors, and facility operators, including exceptions to nonliability, and those questions are different from whether a product was defective. A waiver's effect depends on its terms and the circumstances.
The deadline analysis for an injury to a minor is different from the ordinary adult case. It is not safe to assume either that the clock has run or that there is unlimited time. Get an assessment.
Most injury claims against a private party must be filed within two years of the date of injury under Code of Civil Procedure section 335.1. Claims based on a health care provider's professional negligence follow section 340.5. Where a public entity may be responsible, a written claim generally must be presented before any lawsuit, on a much shorter timeline. Injuries to minors and warranty-based claims follow different rules.
