This replacement engine coolant reservoir is manufactured from premium plastic to withstand the stresses of underhood heat and engine vibration. It is thoroughly tested to ensure optimum fit and performance on specific vehicle applications. Our solutions are thoroughly tested and inspected, and if you experience any difficulty installing or using our parts, we have a dedicated technical support team of ASE Blue Seal certified professionals ready to help. To learn more about our quality and innovation, visit DormanProducts.com.