Gates 24203 Radiator Coolant Hose - Lower

Gates 24203 Molded Coolant Hose Overview

The Gates 24203 molded coolant hose is a direct-fit radiator coolant hose built for specific BMW applications. It uses EPDM, plastic, and steel construction with molded routing and integrated quick-connect fittings to match the original hose layout on select BMW Z4, 335i, 335is, 335xi, 335i xDrive, and 135i models.

As part of the Gates Molded Coolant Hose line, this hose is made for application-specific fitment and OE-style integration, including molded shape and factory-style connector design where required.

Key Features

• Part number: 24203
• Radiator coolant hose for the lower cooling circuit
• Molded hose design for factory-style routing
• EPDM, plastic, and steel construction
• Two female quick connectors
• 1.25 in. inside diameter at both ends
• 22.5 in. centerline length
• Compatible with select BMW turbocharged applications

Detailed Product Description

Gates 24203 is engineered as a molded coolant hose for vehicles that require a shaped lower hose assembly rather than a universal straight hose. The molded profile helps maintain the original coolant path, while the integrated female quick connectors support OE-style connection points. This makes it a practical replacement for BMW cooling systems that rely on precise hose geometry and connector placement. If you are replacing a lower radiator coolant hose on a BMW Z4, 335i, or 135i, this part number 24203 provides the application-specific construction needed for a proper service replacement.

This part cross-references Dayco 72774 for the same application.

Vehicle Fitment

• Fits 2015-2016 BMW Z4, lower
• Fits 2009-2013 BMW Z4, lower
• Fits 2011 BMW 335is, lower
• Fits 2008-2010 BMW 135i, lower
• Fits 2007-2010 BMW 335i, lower
• Fits 2009-2010 BMW 335i xDrive, lower
• Fits 2007-2008 BMW 335xi, lower

Installation Notes and Tips

• Verify the lower hose routing and connector style before installation.
• Inspect mating quick-connect fittings and sealing surfaces for wear or contamination.
• Drain the cooling system before removing the existing hose.
• Confirm the hose follows the original path without twist or tension.
• Refill and bleed the cooling system according to BMW service procedures.

Quality Assurance

Gates is a recognized automotive aftermarket supplier with a modular coolant hose line built around application-specific fitment and OE-style integrated components. The Gates 24203 follows that product approach for select BMW cooling system repairs.