- Wide Compatibility: This coolant expansion tank is designed to fit a range of models, including the 1, 3, 5, 7 Series, E34, E39, E60, E38, and E31, ensuring seamless integration with your vehicle. - Direct Replacement: Specifically crafted to replace the original coolant expansion tank, part number 17111712788, making installation straightforward and hassle-free. - Enhanced Cooling System Performance: This expansion tank facilitates proper bleeding of the cooling system, effectively preventing air pockets that can lead to overheating, ensuring your engine runs smoothly. - Durable Construction: Made from high-quality materials that can withstand extreme temperatures and pressures within the cooling system, providing long-lasting reliability. Practical Applications: - Routine Maintenance: Ideal for regular vehicle maintenance, this expansion tank ensures optimal cooling system function, extending the life of your engine. - Engine Overhaul: A critical component to replace during engine rebuilds or when addressing cooling system issues, ensuring proper coolant circulation. - Emergency Replacement: A reliable solution for unexpected coolant system failures, allowing for quick replacement to minimize downtime and keep your vehicle operational. This coolant expansion tank combines functionality, durability, and compatibility, making it an essential upgrade for your vehicle's cooling system.