1. OEM Compatibility: Precisely engineered to meet factory specifications, this coolant expansion tank with cap is a seamless replacement for your original part. Compatible with a wide range of models—including C3 Aircross, DS3, 308 Mk2, and more—it guarantees a fit, eliminates compatibility issues, and ensures safety for car owners. 2. Effortless Installation UserFriendly Design: Designed for quick and easy installation, this expansion tank requires no tools or technical expertise. Simply your old tank for a hassle experience, making it ideal for both DIY enthusiasts and professional mechanics while saving time and reducing labor costs. 3. Durable Construction Reliable Performance: Crafted from quality plastic in sleek white and black, this expansion tank is built to last. Its stable properties and reliability ensure consistent coolant management, engine performance, and protection against overheating, extending the lifespan of your vehicle's cooling system. 4. Comprehensive Fit OEM Part Numbers: This brand product includes OEM part numbers such as 1323T9, 003637681, 9800777280, and SU001A3738. Verify compatibility by checking the listed models and part numbers to ensure a match and maximum efficiency for your car's cooling system.