AUDI Genuine Radiator Expansion Tank Cap 3B0121321

Replacement Number: 3B0121321.

Description: The Audi Genuine Radiator Expansion Tank Cap 3B0121321 is engineered to maintain the correct pressure in your vehicle’s cooling system, ensuring optimal engine temperature control. Manufactured to Audi’s strict OEM standards, this cap provides a secure, leak-proof seal that helps prevent coolant loss and overheating. Made from high-quality, heat-resistant materials, it is designed to withstand extreme temperature and pressure conditions. Using a genuine Audi expansion tank cap helps protect the radiator, hoses, and engine components, ensuring long-term reliability, safety, and consistent cooling performance.