Genuine 17127508012 Radiator Coolant Hose

BMW 745i and 745Li Radiator Coolant Hose

This Genuine radiator coolant hose is a direct-fit cooling system component for select BMW 7 Series models. It is the vent line at the expansion tank cap, built for 2002-2005 BMW 745i and 745Li applications.

Key Features

• Genuine part number 17127508012
• Radiator coolant hose for the cooling system vent line
• Fits the expansion tank cap vent line location
• Compatible with 2002-2005 BMW 745i and 745Li
• OE-style replacement for factory routing and fitment

Detailed Description

Part number 17127508012 is a Genuine radiator coolant hose used as the vent line at the expansion tank cap on select BMW 745i and BMW 745Li models. This hose supports the cooling system’s vent routing, helping maintain proper connection between the expansion tank cap area and the rest of the coolant circuit. If you are replacing a worn, cracked, or leaking vent line on a 2002-2005 BMW 745i or 745Li, this part provides the correct application-specific fit.

Search terms such as BMW 745i coolant hose, BMW 745Li radiator hose, and 2002-2005 BMW expansion tank vent line all point to this exact application. The Genuine 17127508012 part number is also useful when verifying the correct replacement before ordering.

What It Is Used For

• Replacing a cracked or brittle expansion tank cap vent line
• Restoring proper coolant vent routing in the BMW cooling system
• Addressing coolant seepage at the vent hose connection
• Correcting fitment issues caused by an incorrect hose shape or length
• Maintaining the original hose routing on BMW 745i and 745Li models

Installation Notes and Tips

Confirm the vehicle is a 2002-2005 BMW 745i or 745Li and verify the vent line location at the expansion tank cap before installation. Inspect the surrounding cooling system connections for wear, residue, or damage so the replacement hose seats properly. Match the part number 17127508012 to the original hose routing for accurate installation.

Quality Assurance

Genuine parts are built to OE specifications for the listed application, supporting proper fit and function on the vehicles shown.