This field returns terms from the keywords in the request that match values in one of the item's compatible applications (vehicles). If the keywords match more than one compatible application for an item, the field returns "Two or more of your vehicles" to indicate multiple matches.
For example, keyword queries that contain vehicle details, such as make and model (e.g., Honda Accord), in addition to keywords for the part or accessory, will search through structured parts compatibility information for matching listings. If an item has a 2017 Honda Accord (any trim or engine) specified as a compatible application, and the item matches the part or accessory terms in the query, this field will return the matching terms from the query (i.e., Honda Accord).
Parts compatibility is an eBay feature that uses structured data to associate compatible assemblies with parts and accessories listed on eBay. For example, parts compatibility enables sellers to specify accurately and comprehensively the vehicles on which a side mirror or a rim fit. Parts compatibility improves search relevancy and frees up item titles and descriptions for more useful descriptions of the part.
See the
Field Index to learn which calls use compatibility.