Rein 17-12-7-578-405 Coolant Hose Expansion Tank to Radiator

The Rein 17-12-7-578-405 is a premium replacement coolant hose designed to connect the expansion tank to the radiator in BMW cooling systems. This vent hose plays a critical role in maintaining proper coolant circulation and preventing overheating by allowing coolant to flow between the expansion reservoir and the radiator.

Key Features:

• Constructed from high-quality plastic materials engineered to withstand extreme temperature fluctuations and coolant exposure
• Direct replacement for BMW OEM part number 17127578405, ensuring precise fit and function
• Manufactured to meet or exceed original equipment specifications for reliable performance
• Black finish matches OEM appearance for seamless integration
• Designed as a vent hose configuration for proper cooling system pressurization

This cooling system component is engineered to restore your vehicle's cooling performance to factory standards. Regular replacement of coolant hoses helps prevent cooling system failures that can lead to engine damage. Rein Automotive specializes in manufacturing high-quality replacement parts for European vehicles, offering a cost-effective alternative to OEM components without sacrificing quality or reliability.

Cross-Reference Numbers: 17127578405, V202356, V20-2356, 7578405, 17 12 7 578 405