Most manufacturers’ new-piano warranties cover any defect in materials or workmanship for a specified length of time, ranging from 5 to 15 years. Besides the length of the warranty, the major difference between them is whether or not the warranty is transferable to future owners within the warranty period. A few are; most are not. Most cover the cost of shipping the piano back to the factory for repair, but this rarely becomes an issue because most warranty repairs are carried out in the home, or the piano is replaced, not repaired.
One of the less discussed, but more important, aspects of a piano warranty is who, exactly, is the entity guaranteeing the piano — the manufacturer, distributor, or dealer — and which is most likely to be around for the next 15 years. You can read more about piano warranties in this article.