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Gates 23921 Radiator Coolant Hose - Upper
| Brand | Gates 23921 |
|---|---|
| Position | Upper |
| 3 | |
| Yes | |
| Branch Quantity | 0 |
| Centerline Length | 10.25 |
| Centerline Length | 260 |
| Contains Spring | No |
| End 1 Inside Diameter | 1.534 |
| End 1 Inside Diameter | 39 |
| End 2 Inside Diameter | 1.531 |
| End 2 Inside Diameter | 39 |
| Material | EPDM, Plastic, Steel |
| Modular Components | 3 Quick Connectors, Bleeder Valve |
| Modular Hose | Yes |
| Molded | Yes |
| Number of Quick Connect Fittings | 3 |
| Product line | Molded Coolant Hose |
| Fits | BMW · 6 vehicles |
Molded coolant hose. Shaped for a precise fit with OEM-style modular construction.
Integrated components. Includes quick connectors and a bleeder valve for a complete assembly.
EPDM construction. Combines rubber, plastic, and steel for durable coolant flow.
Cross-references Gates 23921, Genuine 17127514404 and Rein CHR0379R for the same application. See all 6.
Gates 23921 Molded Coolant Hose for BMW Z4
The Gates 23921 molded coolant hose is a direct-fit radiator coolant hose for select 2003-2005 BMW Z4 models in the upper cooling circuit. Built from EPDM, plastic, and steel, it follows OEM-style routing and includes integrated modular components for a precise replacement.
Key Features
- Fits 2003-2005 BMW Z4, upper
- Molded coolant hose built for the radiator cooling system
- OEM-style modular hose design with integrated components
- Includes 3 quick-connect fittings and a bleeder valve
- Constructed from EPDM, plastic, and steel for application-specific fitment
- Centerline length: 10.25 in. (260 mm)
- End inside diameters: 1.534 in. (39 mm) and 1.531 in. (39 mm)
Product Details
Gates Molded Coolant Hose part number 23921 is engineered for specific vehicle applications and mirrors the layout of the original hose assembly, including essential integrated OE-style components such as quick-connectors and a bleeder valve. This makes it a strong choice for BMW Z4 upper radiator hose replacement when the original hose assembly needs to be restored to factory-style routing and connection points. Gates 23921 is also referenced under cross numbers such as Genuine 17127514404.
Common Cooling System Issues It Can Address
- Cracked or leaking upper radiator hose
- Damaged quick-connect fittings at the hose ends
- Coolant seepage at integrated connection points
- Improper hose routing from a worn molded assembly
- Air bleeding concerns related to a failing bleeder valve
Installation Notes
Verify the vehicle’s year, model, and upper hose routing before installation. Inspect mating connectors, clamps, and nearby cooling system components for wear or contamination before transferring the new hose into place. Confirm that the hose seats fully on the connection points and that the bleeder valve is positioned correctly for proper coolant service.
Quality Assurance
Gates is a recognized aftermarket supplier of modular coolant hose assemblies, and this part is manufactured to application-specific dimensions and OE-style requirements for the listed BMW Z4 fitment.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2005 | BMW | Z4 | 2.5L | L6 | GAS | Upper | Molded Coolant Hose |
| 2005 | BMW | Z4 | 3.0L | L6 | GAS | Upper | Molded Coolant Hose |
| 2004 | BMW | Z4 | 2.5L | L6 | GAS | Upper | Molded Coolant Hose |
| 2004 | BMW | Z4 | 3.0L | L6 | GAS | Upper | Molded Coolant Hose |
| 2003 | BMW | Z4 | 2.5L | L6 | GAS | Upper | Molded Coolant Hose |
| 2003 | BMW | Z4 | 3.0L | L6 | GAS | Upper | Molded Coolant Hose |
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