Gates 23420 Radiator Coolant Hose - Lower

Gates Molded Coolant Hose 23420

Gates 23420 is a molded radiator coolant hose built for specific BMW lower hose applications that require integrated OE-style features. It uses EPDM, plastic, and steel construction and is shaped to match the routing and connection points found on the listed vehicles.

The Gates Molded Coolant Hose line focuses on application-specific replacement parts that mirror original equipment layouts, including molded shapes and integrated components such as quick-connect fittings and sensor ports where required. For BMW 128i, 328i, 328i xDrive, 323i, 325i, 328xi, 330i, 325Ci, 325xi, 330Ci, and 330xi applications, this part number supports lower coolant hose replacement with the correct connection style.

Key Features

• Part number: 23420
• Molded radiator coolant hose for lower hose applications
• EPDM, plastic, and steel construction
• Centerline length: 13.5 in. (343 mm)
• End 1 inside diameter: 1.81 in. (46 mm)
• End 2 inside diameter: 1.81 in. (46 mm)
• Modular hose design with 2 female quick connectors and a sensor port
• No spring included
• Direct replacement style for OE-shaped routing

Vehicle Fitment

• Fits 2008-2013 BMW 128i, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2012-2013 BMW 328i, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2007 BMW 328i, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2012-2013 BMW 328i xDrive, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2006-2008 BMW 323i, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2006-2007 BMW 325i, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2007 BMW 328xi, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2006-2007 BMW 330i, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2006 BMW 325Ci, lower; Molded Coolant Hose
• Fits 2006 BMW 325xi, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose
• Fits 2006 BMW 330Ci, lower; Molded Coolant Hose
• Fits 2006 BMW 330xi, lower; W/Sensor; W/Quick Connect Fitting; Molded Coolant Hose

Detailed Description

Gates 23420 is a molded lower radiator coolant hose engineered for BMW cooling system service where the original hose includes quick-connect interfaces and, on select applications, a sensor port. The molded shape helps match factory hose routing, while the modular design supports OE-style connection points used on the listed BMW 128i and 3 Series models. If you are replacing a leaking or damaged lower coolant hose on a 2006-2013 BMW 328i or related application, this hose is built around the original layout rather than a universal cut-to-fit design.

This part cross-references Continental 67227 and Dayco 72704 for the same application.

Common Repair Uses

• Coolant leakage from a cracked or aged lower hose
• Damaged quick-connect fitting at the radiator or engine connection
• Sensor-port related hose replacement on equipped BMW cooling systems
• Incorrect hose routing after prior cooling system repair
• Restoring proper coolant flow in a BMW 128i, 328i, or 330i lower hose application

Installation Notes

Verify the vehicle year, model, and lower-hose configuration before installation, especially on BMW applications with sensor ports or quick-connect fittings. Inspect mating connectors, seals, and adjacent cooling system components for wear before installing the new hose. Confirm the hose is fully seated and routed to match the factory path, then refill and bleed the cooling system according to BMW service procedures.

Quality Assurance

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