The coolant reservoir for your Nissan pickup, specifically designed to work with your Frontier or Navara II vehicles, which are both equipped with the D40 engine. This reservoir, bearing the part numbers 21710-JR80A and 21710-EC01A, is made from high-quality materials to ensure longevity and efficiency. It's a perfect fit for the radiator tank on your vehicle, providing a leak-proof connection that saves time and money on repairs. By using this aftermarket component, you're ensuring your vehicle's cooling system remains in top condition, enhancing its overall performance and reliability. With its OEM-quality construction and straightforward installation, this coolant reservoir is the perfect solution for any Nissan pickup owner looking to maintain their vehicle's engine temperature and prolong its lifespan.