Final answer:
A manufacturer may not be required to warn about risks that are obvious, unforeseeable, common, or inherent. The automobile manufacturer in the example is liable due to knowledge of the brake defect and proceeding with sales, which led to accidents.
Step-by-step explanation:
Manufacturer's Duty to Warn
In product liability law, a manufacturer has a duty to warn consumers about the risks associated with their products. However, courts generally recognize that this duty does not extend to risks that are obvious and well-known, unforeseeable and unpredictable, common and expected, or unavoidable and inherent. A manufacturer might not be held liable for failing to warn about such risks. In the provided counter example situation, the automobile manufacturer could be held liable because it had prior knowledge of a defect with the brake system, which is neither obvious nor well-known to the consumer, and chose to sell the faulty models anyway, which resulted in injuries and deaths.