Genuine BMW 17-13-8-677-649 Engine Coolant Expansion Tank

The Genuine BMW Engine Coolant Expansion Tank is an OEM replacement component designed to maintain proper coolant system pressure and fluid levels in your BMW vehicle. This factory-spec expansion tank serves as a reservoir for coolant as it expands and contracts during engine temperature changes, ensuring consistent cooling system performance.

Key Features:

• Genuine BMW OEM part for exact fit and reliable performance
• Durable construction designed to withstand high temperatures and pressure cycles
• Includes integrated level sensor mounting location for accurate coolant monitoring
• Direct replacement for worn or cracked original expansion tank
• Helps prevent coolant loss and overheating issues

This expansion tank is a critical component of your BMW's cooling system, working in conjunction with the radiator, thermostat, and water pump to regulate engine temperature. Regular inspection and replacement of the coolant expansion tank when signs of wear appear helps prevent costly cooling system failures and maintains optimal engine performance.