Dayco 72309 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose 72309

Dayco 72309 is a curved radiator coolant hose for select Volkswagen cooling system applications. Built from EPDM and finished in black, it uses a single I.D. hose design with a protective sleeve to help manage routing and abrasion in the engine bay.

Compatible with 1999-2004 Volkswagen Golf lower radiator hose applications and 1999-2004 Volkswagen Jetta lower radiator hose applications without Quick Connect, this hose is a direct-fit cooling system service part for the VW Golf and Jetta platform.

Key Features

• EPDM construction for coolant hose service
• Black finish for OE-style appearance
• 1 1/4 in. inside diameter at both ends
• Single I.D. hose design
• Protective sleeve included
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved radiator hose layout for lower cooling system routing

Product Details

The Dayco Curved Radiator Hose line is built for vehicle-specific cooling system routing where a formed hose is needed to connect the radiator and engine-side coolant passages. Part number 72309 uses EPDM rubber for heat and coolant exposure, with a protective sleeve to add durability in routed areas. This hose cross-references ACDelco 26383X and Gates 22566 for the same application.

Fits 1999-2004 Volkswagen Golf, lower. Fits 1999-2004 Volkswagen Jetta, lower. For Volkswagen Golf and Volkswagen Jetta cooling system service, 72309 provides the correct curved profile for the lower hose position on vehicles without Quick Connect.

Common Replacement Reasons

• Cracked or hardened lower radiator hose
• Coolant seepage at the hose body
• Swelling, soft spots, or hose collapse
• Incorrect hose routing after cooling system repair
• Replacement during radiator, thermostat, or water pump service

Installation Notes

Verify the vehicle uses the lower hose configuration without Quick Connect before installation. Match the 1 1/4 in. end diameters and confirm routing against the original hose shape. Inspect clamps, necks, and adjacent cooling components for wear before reassembly.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for coolant hose service. Part number 72309 is built for the stated Volkswagen Golf and Jetta applications and follows the dimensional and material requirements listed above.