The Vaico Expansion Tank Hose (525i 530i 545i 645Ci) - V201279 is a high-quality replacement hose for the expansion tank in BMW 525i, 530i, 545i, and 645Ci models. This hose is designed to withstand high temperatures and pressure, ensuring reliable and long-lasting performance. It is made from durable materials and meets or exceeds OEM specifications for fit and function. This expansion tank hose is a crucial component of the cooling system, helping to regulate the flow of coolant and maintain proper engine temperature. It is a direct fit replacement and does not require any modifications for installation. Keep your BMW running smoothly and efficiently with the Vaico Expansion Tank Hose.