Yamaha Mirror Assembly 1 - F3X-U590D-S0-00. OEM Side Mirror for Reliable Rear Visibility. The Yamaha - Mirror Assy. 1 - F3X-U590D-S0-00 is a factory-original replacement side mirror assembly designed for Yamaha watercraft. Engineered to restore full rear-view visibility, this component is essential for safe operation, especially in high-traffic waterways and docking situations.. Built to Yamaha's exact standards, this mirror assembly offers a secure fit, clear visibility, and durable constructio