Original: A breach of warranty occurs when the promise is broken, i.e., a product is defective or not as should be expected by a reasonable buyer.
Simplified: It is breach of warranty when the promise is broken, i.e., a product is defective or not as good as should be expected by a reasonable buyer. Breach of warranty A warranty is violated when the promise is broken; when goods are not as should be expected, at the time the sale occurs, whether or not the defect is apparent.