Dayco 72983 Radiator Coolant Hose - Lower or Upper

Curved Radiator Hose for Subaru and Lexus

Dayco 72983 is a curved radiator coolant hose made from EPDM rubber for dependable coolant transfer in select Subaru and Lexus applications. It is built as a single I.D. hose with matching 1 15/32-inch inside diameters at both ends for a precise OE-style fit.

The Dayco Curved Radiator Hose line is engineered for direct replacement cooling-system service, with a shape that follows the factory routing on the vehicle. For buyers searching for a Subaru WRX lower radiator hose or a Lexus IS300 upper radiator hose, Dayco 72983 matches the listed applications below.

Key Features

• EPDM construction for cooling-system use
• Black finish for a factory-style appearance
• Curved radiator hose design for routed coolant connections
• Single I.D. hose with 1 15/32-inch inside diameter at both ends
• Outside diameter: 1 27/32 inches at each end
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco part number 72983 for easy identification

Detailed Description

Dayco 72983 is a radiator coolant hose designed for vehicles that use a curved hose profile in the cooling circuit. The EPDM rubber construction is suited for coolant exposure and temperature cycling, while the molded shape helps maintain the correct routing between connection points. This hose is listed for 2015-2021 Subaru WRX lower applications, 2014-2018 Subaru Forester lower applications, 2016-2018 Lexus IS300 upper applications, 2014-2017 Lexus IS350 upper applications, 2018 Lexus IS350 upper applications to 10/2017, and 2014-2015 Lexus IS250 upper applications.

For shoppers comparing a Subaru WRX lower radiator hose or a Lexus IS350 upper radiator hose, Dayco 72983 provides a direct-fit replacement option with the dimensions and shape needed for the specified vehicles. The part number 72983 is also useful when cross-checking cooling-system service records or ordering by catalog reference.

What This Hose Helps Address

• Coolant leaks from a cracked, swollen, or aged radiator hose
• Softening or collapse of the original hose under heat and pressure
• Incorrect hose routing after cooling-system repair
• Loss of coolant flow caused by a damaged upper or lower hose
• Service replacement for worn Subaru WRX, Subaru Forester, Lexus IS300, Lexus IS350, or Lexus IS250 hose assemblies

Installation Notes and Tips

Verify the vehicle year, engine configuration, and hose position before installation. Match the hose to the listed upper or lower application and confirm the end diameters and curved profile align with the factory routing. Inspect clamps, necks, and adjacent cooling components for wear or corrosion before refilling the system and bleeding air from the cooling circuit.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for cooling-system service. The EPDM material and molded construction support consistent fitment in the listed Subaru and Lexus applications. Part number 72983 identifies this specific curved radiator hose for catalog and service matching.