91052-Zv4-003 Bearing (15X21X12) - Overview. The 91052-ZV4-003 Bearing (15X21X12) is a vital needle bearing component designed specifically for Honda marine engine systems. This bearing supports the smooth rotation and mechanical motion within the marine engine's drive shaft assembly, contributing to reliable operation and longevity of your marine equipment. Made to exact factory specifications with dimensions 15x21x12 mm, it ensures seamless integration with existing parts, maintaining optimal