Direct replacement for factory part number 21712-50M01. Designed specifically for the coolant overflow reservoir (expansion tank) of select Nissan & Infiniti models.
Features an inner threaded diameter of 33mm (1.3 inches). Before purchasing, please measure the neck of your current reservoir to ensure compatibility.
Made of high-quality, heat-resistant plastic with an integrated sealing ring. Prevents coolant leaks, fluid evaporation, and ensures stable system pressure.
Provides excellent corrosion resistance and withstands high engine bay temperatures for long-lasting performance.
Simple "twist-on" replacement. Requires no special tools or modifications. Remove your worn-out yellow cap and screw this one on.