Types of Product Defects That Prompt Liability Lawsuits


When making a claim for strict liability in a product liability case, it is necessary to prove that the product was defective by proving that it was “unreasonably dangerous for its intended use” as a result of a defect or defects.

A product may be inherently dangerous but have substantial value, or “utility” such that the danger is one which would not be considered “unreasonable”.

For instance, gasoline is an inherently dangerous product, but its utility far outweighs any danger posed by it. Therefore, the law does not consider gasoline to be unreasonably dangerous for its intended use. If there were an alternative, less dangerous, and no more costly fuel available, the law would likely permit a product liability action to prove that gasoline is an unreasonably dangerous product, and therefore, defective. Similarly, a knife is a dangerous product, but the law wouldn’t consider it “unreasonably” dangerous unless it was manufactured with a handle so fragile that it will snap during ordinary use.

Certain types of products, such as medical drugs, may be considered unavoidably unsafe.

There are many drugs used in the treatment of serious and fatal diseases which themselves may cause serious injury and even death. Although these products may be clearly “dangerous,” they may not be considered “unreasonably dangerous” if proper information and warnings are given to users.

In general, there are three types of defects which could render a product unreasonably dangerous:

  • Manufacturing defect – Error in product manufacture or assembly
  • Design defect – Faulty product design
  • Manufacturer or seller’s failure to warn of danger associated with use of the product

Manufacturing Defects

Manufacturing defects are flaws that typically occur in a relatively low number of units of a given product, since the defects occur during the manufacturing process of a product. Any number of problems can occur during production and assembly of complex products – a screw may not be adequately tightened, a bolt may be missing, wires may be crossed or pieces may be incorrectly soldered. As a result, the product comes off the assembly line in defective condition.


A transistor is improperly installed into a hair dryer, causing the unit to smoke and eventually burn up. The manufacturing defect poses a risk of electrical shock, as well as a fire hazard. If it causes a shock or a fire in your home, the manufacturer will be liable for injury and damages which result.

Product Design Defects

Product design defects are inherent flaws in the design of a product, such that even if a product is assembled and produced perfectly, it will always comes out of the factory in dangerous condition. An automobile that will explode upon impact would be considered to have a design defect.


A ladder is constructed of lightweight aluminum, which can bend, or cause the ladder to tip with little force. Even if every such ladder is assembled correctly, it will still create a dangerous situation for users of the ladders. Such a ladder is considered to have a design defect.

Design defects also apply to the way products are packaged. For example, if an insect poison is sold in a bottle that is prone to leaking, or requires a user’s hands to come in contact with the poison, the manufacturer could be liable for injuries which result from the defective design.

Much of today’s product liability cases consists of design defect cases, and this field is broad enough to cover such claims as asbestos litigation, vaccine and other drug litigation, flammable fabric litigation, dangerous power tool or appliance litigation, defective medical implant litigation (including breast implants), and any other area in which a product’s design makes it unreasonably dangerous for its intended use, thereby causing injury.

In a negligence claim, a plaintiff must show that a manufacturer, seller, wholesaler or other party involved in the distributive chain had a duty to exercise reasonable care in the process of manufacturing or selling a product and failed to fulfill that duty, resulting in injury to the plaintiff.

Negligence consists of doing something that a person of ordinary prudence would not do under the same or similar circumstances; or failing to do something that a person of ordinary prudence would do under the same or similar circumstances. This can take the form of negligence in drawing up or reviewing plans for a product, negligence in maintaining the machines that make the component parts of the product, negligence in failure to anticipate probable uses of the product, negligence in failure to inspect or test the product adequately, negligence in issuing inadequate warnings or instructions regarding the use of the product, or any other aspect of the manufacturing or distribution process where due care is not used.

A breach of warranty claim arises under the law of contracts, where the law imposes certain “implied warranties” on the sale of goods. Such warranties include the warranty of merchantability (that the goods are in proper condition for use and free of defects), and the warranty of fitness for a particular purpose (e.g., the refrigerator must be able to keep food cold and fresh; the chair must be capable of supporting a person’s weight). These warranties are called implied warranties because the law assumes that they apply even if they are not expressly stated.

Failure to Warn About Product Dangers

Inadequate instructions and warnings are also a basis by which a product can be determined to be defective. Inadequate warnings generally are those which fail to prevent the improper use or assembly of a product.

Product manufacturers have a responsibility to provide consumers with clear and complete instructions to ensure the safe use of a product. This is particularly important where the product is “intrinsically dangerous”, i.e., of such a character to be harmful in its ordinary use absent proper caution (chemicals, drugs, machinery, etc.). In that case, the manufacturer must adequately warn consumers of the potential dangers, and the alert must be explicit and written in language that is easily comprehensible to the average person.

Failure to adequately and properly warn, with regards to use, handling, dangers, and other effects of a product is a common basis for product liability lawsuits. An otherwise useful product carrying inherent risks may be determined to be unreasonably dangerous for its intended use solely due to the absence of an adequate warning alerting the user to the danger.

In product liability cases it is essential that measures be taken promptly to preserve evidence, document the chain of custody of the product in question, and to enable engineers or other expert witnesses to thoroughly evaluate the product and your injuries. If you or a loved one has been injured by a product of any kind, call Brotman Nusbaum Ibrahim & Adelman now at (888) 661-6266 or fill our our form for a free consultation. Don’t delay! You may have a valid claim and be entitled to compensation for your injuries, but a lawsuit must be filed before the statute of limitations expires.

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