Dayco 72099 Radiator Coolant Hose - Lower

Curved Lower Radiator Hose for Hyundai and Kia

Dayco 72099 is a curved radiator coolant hose built for lower cooling system routing on select Hyundai and Kia vehicles. Made from EPDM with a black finish, it uses a single I.D. hose design and includes a protective sleeve for added abrasion resistance in the engine bay.

The Dayco Curved Radiator Hose line focuses on direct-fit cooling system replacement parts that match OE-style routing and dimensions. This hose measures 1 3/8 in. inside diameter at both ends and meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications.

• EPDM construction for coolant hose service
• Black finish for a clean OE-style appearance
• 1 3/8 in. inside diameter at both ends
• Single I.D. hose design for lower radiator routing
• Protective sleeve included; heat shield not included
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards

Detailed Product Overview

This Dayco radiator coolant hose is intended for lower cooling system connections on 1999-2005 Hyundai Sonata, 2001-2006 Kia Optima, 2001-2006 Kia Magentis, 2001 Hyundai XG300, and 2002-2005 Hyundai XG350 applications. If you are replacing a worn lower radiator hose on a Hyundai Sonata or Kia Optima, Dayco 72099 provides the curved routing and hose sizing needed for a proper replacement. The part number 72099 is also a useful reference when cross-shopping OE and aftermarket listings.

This part cross-references ACDelco 24426L and Gates 22481 for the same application.

Common Problems This Hose Can Address

• Coolant leaks from cracked or aged hose rubber
• Softening, swelling, or collapse in the lower radiator hose
• Loss of coolant from worn hose ends or split bends
• Improper hose routing after a previous replacement
• Cooling system service on a Hyundai Sonata, Kia Optima, or related model

Installation Notes and Tips

Verify the hose path, end diameters, and lower radiator connection points before installation. Inspect adjoining clamps, radiator necks, and engine fittings for wear or corrosion, and replace any damaged sealing surfaces before installing the new hose. Confirm that the protective sleeve is positioned to protect the hose from nearby heat or abrasion sources.

Quality Assurance

Dayco manufactures this hose to meet published SAE hose specifications for coolant service, supporting consistent fit and material performance in the listed applications. The Dayco 72099 is a technical replacement choice for lower radiator hose service on compatible Hyundai and Kia vehicles.