Product Description: Durable Expansion Tank Cap for Optimal Engine Performance Enhance your vehicle's cooling system with our reliable Expansion Tank Cap. Designed for a variety of models, this cap ensures a secure fit and exceptional durability, keeping your engine running smoothly under all conditions. OE Number: The Expansion Tank Cap is designed with reference to OE numbers 5193938 and DG938101AA. It is molded based on original data to maintain the integrity of your vehicle's model and ensure a perfect fit. Fitment: This coolant expansion water tank cap is a suitable replacement for several models, including B-Max, C-Max, Ecosport, Fiesta, Focus, Fusion, Galaxy, Range Rover Discovery, Freelander, and C30, C70, S60. Ensure compatibility with your vehicle for optimal performance. Durable Material: Crafted from heavy-duty plastic, this expansion tank cap is highly resistant to extreme temperature fluctuations. Its robust construction ensures long-lasting integrity and performance, even in harsh conditions. Secure Fit: Engineered to fit securely on your radiator coolant tank, this cap prevents any coolant leakage. It ensures your engine maintains its optimal operating temperature, contributing to efficient and reliable performance. Safety Ensured: By securely enclosing the radiator coolant within the tank, the expansion tank cap helps prevent engine overheating. This not only ensures the safety of your vehicle but also extends the longevity of your engine. Upgrade your vehicle's cooling system with our Expansion Tank Cap. Its precise fit, durable construction, and safety features make it an essential component for maintaining your engine's health and performance.