compatibility for multiple models: Radiator caps designed to ensure a seamless fit for various Vauxhall and Opel models, including Astra J, Astra K, Corsa D, Corsa E, Insignia A/B, Zafira B, Zafira Tourer C, and Mokka X. Reliable durability: Engineered from quality, heatresistant materials, this coolant cap ensures durability and a secure seal even under pressure conditions. It prevents coolant leaks and guarantees longterm reliability, making it ideal for vehicles operating in demanding environments. Replaces OEM part numbers for exact fit: Specifically crafted as a direct replacement for OEM part numbers 13598760 13502353 and 53330779. This ensures a precise fit and integration into your vehicle's cooling system, offering a quick and efficient solution for replacing wornout or damaged radiator caps. Effective seal for engine protection: This performance coolant expansion overflow tank with cover plays a vital role in maintaining your engine's temperature by ensuring the cooling system remains sealed and pressurized. Use scenarios Scenario 1: During routine maintenance on a Vauxhall or Opel model listed above, a worn or damaged radiator cap with this direct OEMequivalent to restore proper sealing and prevent coolant leaks. Scenario 2: In hot climates or during demanding driving, the cap helps maintain system pressure, contributing to effective cooling and reducing the risk of overheating. Scenario 3: In a service setting, replacing an OEM cap to restore exact fit and reliability for part numbers 13598760, 13502353, or 53330779, ensuring compatibility with the vehicle's cooling system.