Breach of warranty is the violation of an express or implied contract of warranty, and thus it is a breach of contract. In other words, it occurs when the warrantor fails to provide the assurance warranted. A seller can expressly or implicitly assure the buyer about the quality or title of an item sold. If such assurance is proved to be untrue, the buyer has a claim for breach of warranty.
A warranty must be distinguished from a statement of opinion or a mere prediction of future events (UCC § 2-313(2))
[Last updated in May of 2020 by the Wex Definitions Team]