Genuine OEM Audi Upper Coolant Pipe Sealing Ring, part number 06E121119J. This ring is designed to seal connections within the upper coolant pipe, preventing leaks and ensuring the cooling system operates efficiently. Its precise dimensions and material composition are critical for maintaining a tight, durable seal against temperature fluctuations and pressure. Using a genuine OEM sealing ring guarantees the correct fit and material properties for long-term reliability and proper cooling system function.