Gates 23405 Radiator Coolant Hose - Lower

Gates 23405 Molded Coolant Hose Overview

Gates 23405 is a molded radiator coolant hose built for specific BMW lower hose applications. It uses EPDM, plastic, and steel construction and follows OE-style routing with integrated quick-connect features for a direct replacement on select 1999-2005 BMW 3 Series models.

The Gates Molded Coolant Hose line is built around application-specific modular assemblies. This hose includes OE-style integrated components such as female quick connectors and a service port, helping match the original cooling system layout on the vehicle.

Key Features

• Part number: 23405
• Brand: Gates Molded Coolant Hose
• Radiator coolant hose for lower hose applications
• EPDM, plastic, and steel construction
• Molded design for OE-style hose routing
• Two female quick connectors and a service port
• Centerline length: 18 in. (457 mm)
• End inside diameter: 1.81 in. (46 mm) at both ends
• Modular coolant hose design with integrated OE-style components

Detailed Description

Gates 23405 is a molded lower radiator coolant hose engineered for BMW 323Ci, 323i, 323ti, 325Ci, 325i, 325xi, 328Ci, 328i, 330Ci, 330i, and 330xi applications listed below. It is built to match the original hose shape and connection style, including quick-connect fittings and a service port where specified by the vehicle application. This makes it a direct-fit replacement for cooling system service on select BMW 3 Series models.

This part cross-references Bosch 67226 for the same application.

Vehicle Fitment

• Fits 2001-2005 BMW 320i, Lower
• Fits 2001-2005 BMW 325Ci, Lower
• Fits 2001-2005 BMW 325i, Lower
• Fits 2001-2005 BMW 325xi, Lower
• Fits 2001-2005 BMW 330Ci, Lower
• Fits 2004-2005 BMW 330i, Lower
• Fits 2001-2005 BMW 330xi, Lower
• Fits 2001-2003 BMW 330i, Lower
• Fits 2000 BMW 323Ci, Lower
• Fits 2000 BMW 323i, Lower
• Fits 2000 BMW 323ti, Lower
• Fits 2000 BMW 328Ci, Lower
• Fits 2000 BMW 328i, Lower
• Fits 1999 BMW 328i, Lower

Installation Notes and Tips

Verify the lower hose routing, connector style, and service port layout against the original hose before installation. Inspect mating surfaces, quick-connect seals, and adjacent cooling system components for wear or contamination before connecting the new hose. Confirm the hose is fully seated and locked at both ends after installation.

Quality Assurance

Gates is a recognized aftermarket supplier in modular coolant hose assemblies, and this hose is manufactured to application-specific OE-style specifications for the listed BMW fitments.