Dayco 73063 Radiator Coolant Hose - Lower

Dayco 73063 Curved Radiator Hose

Dayco 73063 is a curved radiator coolant hose built for lower cooling-system routing on select Volkswagen applications. It uses EPDM construction with a black finish and a protective sleeve to help manage underhood wear in demanding engine-bay conditions.

Compatible with 2009-2017 Volkswagen CC, lower; 2009-2010 Volkswagen Passat, lower; and 2009-2010 Volkswagen Passat CC, lower. This Dayco curved radiator hose is a direct-fit cooling hose solution for vehicles that need the correct dual I.D. hose dimensions and formed routing.

Key Features

• Part number: 73063
• Brand line: Curved Radiator Hose
• EPDM hose material for coolant-system service
• Dual I.D. hose design with 1 1/4 in. end 1 inside diameter and 1 7/16 in. end 2 inside diameter
• Black exterior with protective sleeve
• Lower radiator hose application
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Product Details

The Dayco Curved Radiator Hose line is focused on formed coolant hoses that follow factory-style routing and fitment requirements. Part number 73063 is shaped for lower radiator service and uses EPDM construction to handle coolant exposure and engine-bay temperatures. The protective sleeve adds an extra layer where the hose may contact nearby components or experience abrasion.

For Volkswagen CC, Passat, and Passat CC lower hose replacement, 73063 provides the correct curved profile and dual inside diameter sizing needed for a proper cooling-system connection. If you are searching for a lower radiator hose for 2009-2017 Volkswagen CC or a radiator coolant hose for 2009-2010 Volkswagen Passat, this part number is the relevant match.

Common Repair Uses

• Replacing a leaking lower radiator hose
• Restoring coolant flow after hose cracking or hardening
• Fixing coolant loss from split EPDM hose sections
• Addressing fitment issues caused by incorrect hose shape or diameter
• Repairing worn lower cooling-system routing on Volkswagen CC, Passat, or Passat CC

Installation Notes and Tips

Verify the lower hose routing, end diameters, and vehicle application before installation. Inspect hose clamps, mating necks, and nearby brackets for corrosion, sharp edges, or residue that could affect sealing or hose life. Confirm that the hose follows the original curved path without twist or tension, and check coolant level and system integrity after installation.

Quality Assurance

Dayco manufactures cooling hoses to published SAE specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC, for consistent material and dimensional standards. Part number 73063 is built as a formed radiator coolant hose for the listed Volkswagen applications.