Description:

Coolant Reservoir Bottle Coolant Overflow Tank designed to regulate heat dissipation and ensure your engine reaches operating temperature quickly by controlling coolant flow through the radiator.

• Compatible Models: 2000 323Ci, 1999 to 2000 323i, 2001 to 2006 325Ci, 2001 to 2005 325i, 2001 to 2005 325xi, 2000 328Ci, 1999 to 2000 328i, 2001 to 2005 330Ci, 2001 to 2005 330i, 2001 to 2005 330xi, 2004 to 2008 X3, 2001 to 2006 X5
• Interchange Part Numbers: 17111436413, 17111712669, 17117573781
• Key Functions: Reduces cavitation and creates a permanent closed system to minimize coolant loss
• System Benefits: Prevents continuous air ingress, protects parts from damage, separates water and steam, stabilizes system pressure, and increases water pump pumping amount
• Pressure Management: Allows coolant to flow back to the expansion tank to prevent over pressure and replenishes water levels when low
• Installation: Easy installation process requiring no additional hardware
• Dimensions: 15.35 inches length, 5.31 inches width, 5.31 inches height
• Model Number: 115552 5209 1738599651