Genuine 17129845173 Coolant Hose Cylinder Head to Expansion Tank

The Genuine 17129845173 is a factory OEM coolant hose that provides a critical connection between the cylinder head and expansion tank in BMW vehicles equipped with B46 and B48 2.0L turbocharged engines. This precision-engineered hose ensures proper coolant circulation throughout the engine's cooling system, maintaining optimal operating temperatures and preventing overheating.

Key Features:

• Genuine BMW OEM part manufactured to exact factory specifications
• Designed specifically for B46 and B48 2.0L turbocharged engines
• Durable construction engineered to withstand high temperatures and pressure
• Direct replacement for worn or damaged original hose
• Prevents coolant leaks and maintains proper system pressure

This coolant hose supersedes several previous part numbers including 17125A05950, 17128616536, 17128677244, and 17128740118, making it the current replacement for earlier versions. When your cooling system shows signs of deterioration such as seepage, cracking, or bulging hoses, replacing this component with a genuine BMW part ensures reliable performance and proper fitment.