BMW Engine Coolant Bypass Hose - Genuine BMW 17127625383

Product Information

BMW Cooling Hoses diagram for 328i, 328i xDrive, 428i, 428i xDrive

An engine coolant bypass hose is a small but critical component in the cooling system that allows coolant to circulate within the engine when the thermostat is closed. This circulation helps prevent hot spots, reduces the risk of overheating during engine warm-up, and ensures smoother temperature regulation. A properly functioning bypass hose maintains consistent coolant flow and protects the engine from thermal stress.

• Coolant leaks visible around the hose or under the vehicle.
• Engine overheating, especially during warm-up, due to restricted coolant flow.
• Cracks, swelling, or soft spots on the hose, indicating deterioration or impending failure.

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.