The Genuine BMW Expansion Tank - 17137642160 is a high-quality replacement part for BMW vehicles. It is designed to be a direct fit for the original expansion tank and is made with durable materials to ensure long-lasting performance. This expansion tank is an essential component of the vehicle's cooling system, helping to regulate the temperature of the engine. It is a genuine BMW product, ensuring the highest level of quality and compatibility with your vehicle. This expansion tank is part of the BMW Genuine Parts line, which is known for its reliability and superior engineering. It is a crucial part for maintaining the proper functioning of your BMW and ensuring its longevity.