Dayco 73150 Radiator Coolant Hose - Lower

Curved Lower Radiator Hose for Toyota Highlander

Dayco 73150 is a curved radiator coolant hose built for the lower cooling circuit on select Toyota Highlander models. Made from EPDM rubber and finished in black, it follows the routing needed for a clean, secure coolant connection in the engine bay.

Fits 2009-2013 Toyota Highlander, lower. This Dayco Curved Radiator Hose line is focused on OE-style cooling system replacement parts, and 73150 matches the application with the correct curved shape and single I.D. hose construction.

Key Features

• Brand: Dayco
• Part number: 73150
• Part type: radiator coolant hose
• Curved lower hose design for the cooling system
• EPDM construction for coolant service
• Black finish
• Single I.D. hose design
• End 1 inside diameter: 1 5/16 in.
• End 2 inside diameter: 1 5/16 in.
• End 1 outside diameter: 1 11/16 in.
• End 2 outside diameter: 1 11/16 in.
• SAE J20R4 Class D-1 and SAE J1684 Type EC specification

Product Details

Dayco 73150 is a curved radiator hose engineered for the lower hose position on 2009-2013 Toyota Highlander applications. The EPDM rubber construction is suited for coolant transfer, while the curved profile supports the factory hose routing used in the vehicle’s cooling system. The hose measures 1 5/16 inches inside diameter at both ends and is built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards.

Use Dayco 73150 when replacing a worn, cracked, or leaking lower radiator hose on a Toyota Highlander. The part number 73150 is the reference to verify before ordering, especially when matching the lower hose layout on the 2009-2013 Toyota Highlander.

Common Problems This Hose Can Address

• Coolant seepage at the lower radiator hose connection
• Cracking or hardening from heat and age
• Swelling or soft spots in the hose body
• Restricted coolant flow from a deteriorated hose
• Improper fit from a hose with the wrong bend or diameter

Installation Notes and Tips

Confirm the lower hose routing, end diameters, and vehicle application before installation. Inspect the radiator neck, engine connection points, and clamps for wear or corrosion, and replace any damaged sealing surfaces before installing the new hose. After installation, refill the cooling system with the correct coolant and check for leaks once the engine reaches operating temperature.

Quality Assurance

Dayco cooling hoses are built to meet published SAE specifications for hose performance and fitment consistency. Verify Dayco 73150 against the vehicle application and hose dimensions to ensure the correct replacement for your Toyota Highlander cooling system.