Genuine BMW 17111707540 Engine Coolant Expansion Tank Reservoir

The Genuine BMW 17111707540 Engine Coolant Expansion Tank is an OEM replacement reservoir designed to maintain proper coolant levels and pressure in your BMW's cooling system. This factory-spec tank is engineered to BMW's exact specifications, ensuring proper fit, durability, and performance.

Key Features:

• Genuine BMW OEM part manufactured to original equipment specifications
• Durable plastic construction resistant to coolant chemicals and thermal cycling
• Integrated fluid level sensor mounting provisions
• Pressurized cap sealing surface maintains proper system pressure
• Direct replacement for worn or cracked original reservoir
• Includes overflow hose connection and coolant return ports

This coolant expansion tank serves as the pressurized fill point for your BMW's cooling system, allowing for thermal expansion and contraction of coolant while maintaining system pressure. The reservoir features molded level markings to monitor coolant levels and prevent overheating. Using genuine BMW parts ensures proper fit and reliable performance, maintaining your vehicle's cooling system integrity.