Gates 23418 Radiator Coolant Hose - Upper

BMW M3 Upper Radiator Hose

Gates 23418 is a molded coolant hose built for the upper radiator circuit on select BMW M3 models. It follows OE-style routing and integrates the connection points needed for a direct-fit cooling system repair on 2001-2006 BMW M3 applications.

The Gates Molded Coolant Hose line is application-specific and built to match factory-style layouts, including molded shapes and integrated components used in modern cooling systems. Part number 23418 is made with EPDM, plastic, and steel for the correct fit and function in the upper coolant path.

• Fits 2001-2006 BMW M3, upper radiator coolant hose position
• Molded hose design for OE-style routing
• Material construction: EPDM, plastic, and steel
• Includes 2 female quick connectors and a bleeder valve
• Modular coolant hose design for specific BMW cooling system applications
• End inside diameters: 46 mm and 41 mm
• Centerline length: 343 mm

Detailed Product Overview

This Gates 23418 radiator coolant hose is engineered for the upper hose location on the BMW M3 from 2001 through 2006. It is a molded modular hose with two female quick connectors and a bleeder valve, matching the type of integrated hardware commonly used in OE cooling assemblies. For BMW M3 owners replacing a worn upper hose, this part number 23418 provides the correct molded shape and connection style for the listed fitment.

Gates Molded Coolant Hose products are built around specific vehicle applications rather than universal sizing. That makes this hose a practical choice when servicing the upper radiator hose on a BMW M3 and when restoring proper coolant flow through the cooling system.

This part cross-references Bosch 16154 and Four Seasons 66973 for the same application.

Common Repair Uses

• Replacing a cracked or leaking upper radiator hose
• Restoring coolant circulation in the BMW M3 cooling system
• Addressing coolant seepage at quick-connect hose ends
• Repairing a hose with damaged molded routing or connector points
• Correcting bleeder valve or hose-end wear on the upper coolant line

Installation Notes

Verify the vehicle is a 2001-2006 BMW M3 with the upper radiator hose configuration before installation. Inspect the mating quick-connect fittings, bleeder valve area, and adjacent cooling system components for wear, contamination, or damage before transferring the hose into service. Confirm the hose routing matches the factory layout and that all connection points seat fully.

Quality Assurance

Gates is a recognized automotive aftermarket supplier with a focus on modular coolant hose assemblies that mirror OE-style application requirements. Part number 23418 is built for the specified BMW M3 fitment and cooling system configuration.