When a product causes serious injury, one of the first legal questions becomes: What made it defective?
Was the product dangerous from the start, flawed in its very blueprint? Or did something go wrong during production? Understanding the difference between a design defect and a manufacturing defect is critical in product liability cases. It affects how liability is proven, who is responsible, and how a case is built in court.
If you or a loved one has been injured by a dangerous product in South Carolina, here’s what you need to know.
What Is a Design Defect?
A design defect exists when a product is inherently dangerous because of the way it was designed, even if it was manufactured exactly as intended.
In other words, every version of the product carries the same risk.
Key Characteristics of a Design Defect:
- The flaw originates in the product’s blueprint
- All units of the product share the same dangerous feature
- The risk could have been reduced or avoided through a safer alternative design
Example:
A vehicle model with a high center of gravity that makes it prone to rollovers. Even if every vehicle were built perfectly, the danger exists in the design itself.
Government agencies like the National Highway Traffic Safety Administration regularly investigate and recall vehicles due to design-related safety risks.
What Is a Manufacturing Defect?
A manufacturing defect occurs when a product’s design is safe, but something goes wrong during production.
Only certain units are defective, not the entire product line.
Key Characteristics of a Manufacturing Defect:
- The product deviates from its intended design
- The issue occurs during assembly, fabrication, or quality control
- The defect is typically limited to a batch or specific units
Example:
A power tool designed with proper safety guards, but a batch leaves the factory without critical internal fasteners installed.
When this happens, regulatory bodies like the Consumer Product Safety Commission may issue safety warnings or recalls.
How South Carolina Law Defines Product Liability
In South Carolina, product liability is governed by S.C. Code Ann. § 15-73-10.
Under this statute, manufacturers and sellers can be held liable when a product is sold in a defective condition that is unreasonably dangerous to the user or consumer.
South Carolina law follows long-established principles rooted in the Restatement (Second) of Torts § 402A, which sets forth the doctrine of strict liability for defective products.
This means that in many cases, an injured person does not need to prove negligence, only that:
- The product was defective
- The defect made the product unreasonably dangerous
- The defect caused the injury
Both design defects and manufacturing defects fall within this legal framework.
The Legal Difference in Court
While both types of defects can support a product liability claim, the strategy differs significantly.
In a Design Defect Case:
The legal argument focuses on whether a safer, feasible alternative design existed. Experts may analyze:
- Engineering alternatives
- Industry safety standards
- Risk-utility balancing
- Foreseeability of harm
In a Manufacturing Defect Case:
The focus shifts to quality control failures, production errors, and deviations from specifications. Evidence may include:
- Factory inspection records
- Internal quality assurance documents
- Batch tracking and recall data
The burden of proof and expert testimony often vary depending on which theory applies.
Common Products Involved in Defect Claims
Design and manufacturing defects frequently arise in:
- Motor vehicles and auto parts
- Industrial equipment
- Medical devices
- Consumer electronics
- Children’s products
- Heavy machinery
Federal investigations by agencies like NHTSA and the Consumer Product Safety Commission often uncover widespread design or manufacturing failures long before lawsuits are filed.
When to Speak With a Product Liability Attorney
If you suspect a product caused serious harm, you should seek legal guidance if:
- The injury required hospitalization
- The product malfunctioned unexpectedly
- A recall was issued after your injury
- Multiple similar incidents have occurred
Early investigation is critical. Physical evidence, product samples, and documentation can disappear quickly.
If you or a loved one has been injured by a dangerous or defective product, contact KJW Law Firm today for a confidential consultation. We are prepared to investigate, litigate, and pursue full accountability.




