Dayco 72809 Radiator Coolant Hose - Upper

Curved Upper Radiator Hose for Audi and Volkswagen

Dayco 72809 is a curved radiator coolant hose built for upper cooling system routing on select Audi and Volkswagen applications. Made from EPDM rubber and finished in black, it follows the OE-style shape needed for a proper coolant connection on vehicles with a quick connect fitting.

Compatible With 1997-2001 Audi A4, upper; 1997-2001 Audi A4 Quattro, upper; and 1998-2005 Volkswagen Passat, upper. If you are replacing a worn upper coolant hose on an Audi A4 upper radiator hose application or a Volkswagen Passat curved radiator hose setup, Dayco 72809 provides the correct fitment profile.

Key Features

• EPDM construction for cooling system use
• Curved radiator hose design for upper hose routing
• 1 1/4 in. inside diameter at both ends
• 1 17/32 in. outside diameter at both ends
• Single I.D. hose configuration
• Black finish
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Fits quick connect upper hose applications

Detailed Description

Dayco Curved Radiator Hose 72809 is engineered for upper coolant transfer where the hose must follow a formed bend and connect to a quick connect fitting. The EPDM rubber construction is suited for radiator and coolant service, while the matched end diameters support a secure connection on the specified Audi A4, Audi A4 Quattro, and Volkswagen Passat applications. This part number, 72809, is a direct-fit cooling system service part for 1997-2001 Audi A4 and A4 Quattro upper hose locations, as well as 1998-2005 Volkswagen Passat upper hose locations.

Common Problems This Hose Can Address

• Coolant leaks from a cracked or aged upper radiator hose
• Softening, swelling, or hardening of the original hose material
• Improper hose routing after cooling system service
• Connection issues at the quick connect upper hose interface
• Loss of coolant flow caused by a damaged radiator hose

Installation Notes and Tips

Verify the upper hose routing, quick connect style, and end diameters before installation. Inspect adjoining coolant necks and clamps or retaining hardware for wear, corrosion, or damage, and replace any compromised components as needed. After installation, refill and bleed the cooling system according to the vehicle service procedure and check for leaks at operating temperature.

Quality Assurance

Dayco 72809 is built to SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for radiator coolant hose applications. Dayco’s Curved Radiator Hose line focuses on formed hose geometry and OE-style fitment for cooling system service on the listed Audi and Volkswagen vehicles.