Genuine BMW 17 12 5 A4E 4B5 Coolant Overflow Hose

The Genuine BMW 17 12 5 A4E 4B5 is an OEM coolant overflow hose (also referred to as a water hose) engineered specifically for BMW vehicles equipped with the 2.0L engine. As a direct factory replacement part, it is manufactured to the same exacting tolerances and quality standards as the original component installed at the factory.

This overflow hose plays a critical role in the cooling system, routing coolant between the expansion tank and other cooling system components to manage pressure and maintain proper coolant levels during engine operation. Replacing a cracked, brittle, or leaking overflow hose with a genuine OEM part ensures a precise fit and long-term reliability — no modifications or trimming required.

Key Features:

• Genuine OEM BMW part — not aftermarket or remanufactured
• Designed for 2.0L BMW engines (2020–2024 applications)
• Direct, factory-fit replacement for part number 17-12-9-894-755
• Made to BMW's original engineering specifications for proper sealing and durability
• Backed by BMW's manufacturer warranty

Part Details:

• Manufacturer Part Number: 17-12-5-A4E-4B5
• Replaces OEM Part Number: 17-12-9-894-755
• Brand: Genuine BMW
• Category: Cooling System — Hoses & Clamps

For optimal cooling system performance, always replace worn or damaged coolant hoses with genuine BMW parts to maintain factory-level fit, function, and reliability.