Design Defect: This means the whole product was designed poorly or not properly tested, in which case all the products will likely be defective and dangerous. This means showing that the defect caused your injuries and that those injuries would not have occurred if the product had been safe.What constitutes a "defective product" under Texas law? In the state of Texas, a defective product is defined as any product that is unreasonably dangerous due to a defect in its design, manufacture, or warning. There are three broad categories of defective product claims for which defendants can be held liable for personal injury or other damages. Defective products are a strict liability offense in Texas. However, there are a number of defenses available to these claims. There are three main types of product defects: design defects, manufacturing defects, and failure to warn of defects. Manufacturers may be held financially liable when their products expose consumers to an unreasonable risk of injury as a result of a manufacturing defect. Manufacturing defects are the most common type of product liability claim.