Koyo 06-15 Mazda Miata NC All-Aluminum Reservoir Expansion Tank

This expansion tank is an essential component for keeping your vehicle running at optimal temperatures. Koyo products are manufactured with high-quality, OE-grade materials like aluminum, copper, brass, and plastics, and are developed and tested to be resilient to harsh elements and years of under-hood heat cycling. Koyo products do not require any drilling, cutting, or relocating for installation; however, professional installation is highly recommended. Proper coolant selection and a complete cooling system flush and fill with a 50/50 mix of distilled, de-ionized, or de-mineralized water are crucial to prevent corrosion, leaks, and premature wear.