Genuine BMW 17-12-7-640-287 Engine Coolant Expansion Tank

The Genuine BMW 17-12-7-640-287 is an OEM engine coolant expansion tank designed to maintain proper cooling system pressure and fluid capacity in BMW vehicles. This factory original component ensures precise fitment and reliable performance as specified by BMW engineers.

Key Features:

• Genuine BMW OEM part manufactured to factory specifications
• Durable plastic construction engineered for thermal cycling resistance
• Integrated level sensor provision for low coolant warning system
• Direct replacement for worn or damaged expansion tanks
• Includes pressure cap mounting surface and fill neck
• Helps prevent engine overheating and cooling system failure

This expansion tank serves as a critical component of the engine cooling system, allowing coolant to expand and contract with temperature changes while maintaining system pressure. Regular inspection and replacement of the expansion tank prevents coolant leaks and ensures optimal engine operating temperature.