CAPA is the only independent crash part certification program in the U.S. Parts that achieve CAPA certification meet comprehensive testing requirements to ensure comparability to car company brand parts, giving collision repairers parts that fit. Most aftermarket parts do not meet CAPA quality standards. The only way to be sure that the part has been tested for materials, fit and safety compliance is to look for the yellow and blue CAPA Seal: If it’s not on the part, don’t even start.