Rein 17-12-8-602-669 Lower Inner Radiator Coolant Hose for BMW N63 4.4L

The Rein 17-12-8-602-669 is a lower inner radiator coolant hose engineered as a direct OE-replacement for BMW vehicles equipped with the N63 4.4L engine. Rein Automotive is a trusted supplier of European vehicle cooling system components, producing hoses that match OEM fit, form, and function right out of the box.

Key Features:

• OE-Style Lower Inner Position — designed specifically for the inner radiator lower hose position for precise fitment
• Integrated Thermoplastic Couplings — features molded couplings and O-ring seals for leak-free connections to radiator and thermostat housing
• Electrochemical Degradation Resistant Lining — inner lining resists electrochemical cracking common in aging coolant systems
• High-Temp Rated Construction — resistant to air temperatures up to 135°C (275°F) for demanding engine bay conditions
• Chemical Resistance — resistant to oil, mud, salt, road debris, ozone, distilled water, and water/ethylene glycol coolant mixtures
• No Cutting or Trimming Required — designed to install directly from the shelf to the vehicle without modification
• OEM Cross-Reference: 17-12-8-602-669 / 17128602669 / 17 12 8 602 669

Replacing a cracked, swollen, or leaking lower radiator hose is a critical cooling system maintenance task. The Rein 17-12-8-602-669 restores proper coolant flow between the radiator and thermostat housing, helping maintain correct engine operating temperature and preventing overheating.