Genuine BMW 17 12 7 525 869 Heater Return Cooling Hose

The Genuine BMW 17 12 7 525 869 is a factory OEM heater return cooling hose designed for BMW vehicles equipped with N54 and N55 turbocharged engines. This critical cooling system component serves as a multi-port coolant return line that connects the heater core, thermostat housing, expansion tank, and automatic transmission oil cooler.

Key Features:

• Genuine BMW OEM part manufactured to exact factory specifications
• Four-way molded coolant hose design for multiple cooling system connections
• Routes along the subframe as a heater return line from thermostat
• Constructed from heat-resistant rubber compound to withstand engine bay temperatures
• Direct replacement for worn, cracked, or leaking original hose
• Ensures proper coolant flow between heater core, expansion tank, and thermostat
• Prevents coolant leaks that can lead to engine overheating

This heater return line is engineered specifically for BMW E90 and E92 chassis 335xi xDrive models with all-wheel drive. Over time, cooling system hoses are exposed to extreme temperature cycling and chemical degradation from coolant, causing them to become brittle and develop cracks or leaks. Replacing this hose with a genuine BMW part ensures proper fitment, reliability, and long-term durability to maintain optimal cooling system performance.

OEM Part Number: 17127525869, 17-12-7-525-869, 17 12 7 525 869