A-Premium Upper Radiator Coolant Hose for BMW — 10.75in Centerline, OE-fit Quick-Connect

A-Premium's upper radiator coolant hose is a direct-fit replacement for select BMW L6 3.0L and 2.5L models, providing the correct connectors, OEM-style dimensions, and a one-year warranty.

This replacement upper radiator hose is engineered to match the original equipment fit and routing on a range of BMW E-series and Z4 models. Crafted from durable plastic and reinforced steel components, the assembly includes quick-connect fittings and the precise centerline length required for proper coolant flow and engine bay clearance. The listing notes exact part references and centerline length to help you confirm compatibility before purchase.

Will this hose fit my BMW model?

Check the vehicle fitment list and centerline length to verify compatibility. This hose fits many BMW E-series and Z4 models with L6 3.0L and L6 2.5L engines when the vehicle uses the quick-connect upper radiator hose configuration.

• Compatible models include E82/E88 128i (2008–2013), E90/E91 323i (2006–2011), E90 325i/325xi (2006), various 328i/328xi (2007–2013), E90 330i/330xi (2004–2006), and Z4 E89 (2009–2011).
• Verify your car’s original part numbers: 17127531579, 17 12 7 531 579, 117 06291 405, 11706291259, or reference 23419.
• Important measurement: this hose fits vehicles requiring a 10.75-inch centerline; it does not fit 10.5-inch centerline applications.

How is this hose constructed and what materials are used?

The assembly combines engineered plastic with steel reinforcement at connection points to balance flexibility and strength. That construction helps the hose hold its shape under pressure while resisting common coolant exposure and heat cycling in the engine bay.

• Material breakdown: molded plastic body with steel-reinforced connection ends.
• Inside diameter is approximately 1.81 inches to match factory flow characteristics.
• Includes factory-style quick-connectors for a secure, plug-in installation.

What should I know about installation and packaging?

The hose ships individually in a box and is shaped to match the original routing, so replacement is typically straightforward for technicians or experienced DIYers. Always relieve system pressure and allow the engine to cool before removing the old hose.

• Package quantity: 1 hose per box with protective shipping packaging.
• Location designation: upper side radiator hose — install at the top coolant connection point.
• Follow torque and clamp recommendations from the vehicle manufacturer during reinstallation.

Who is this for? This A-Premium upper radiator coolant hose is aimed at owners and mechanics who need a reliable, OE-style replacement for BMW E-series and Z4 models listed above. It’s appropriate for restoration projects, routine maintenance, or when diagnosing cooling leaks related to aging or damaged upper radiator hoses. Confirm part numbers and centerline length against your vehicle’s requirements before ordering to ensure proper fit and function.