Dayco 72203 Radiator Coolant Hose - Lower

Dayco 72203 Curved Radiator Hose

The Dayco 72203 curved radiator hose is a direct-fit coolant hose built for lower radiator routing on select Honda and Mitsubishi applications. Made from EPDM rubber with a black finish, it is shaped to match the cooling system path and maintain a secure coolant connection under normal engine heat and pressure.

Compatible with 2003-2007 Honda Accord lower radiator hose applications and 2004-2007 Mitsubishi Lancer lower radiator hose applications, this hose is built to match the original routing and inside diameter requirements. The Dayco 72203 is also cross-referenced to OE and aftermarket numbers for the same application, including Honda 19505-RAA-A00 and Mitsubishi MN156854.

Key Features

• EPDM construction for cooling-system service
• Black curved radiator hose design for lower hose routing
• 1 3/16 in. inside diameter at both ends
• Single I.D. hose configuration
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Compatible with 2003-2007 Honda Accord and 2004-2007 Mitsubishi Lancer lower radiator hose applications

Detailed Description

Dayco Curved Radiator Hose 72203 is engineered as a replacement coolant hose for lower radiator connections where a formed hose is required. The EPDM rubber construction is suited for coolant exposure and temperature cycling, while the curved profile helps follow the factory hose path without forcing the line into a straight or stressed position. With a 1 3/16 in. inside diameter on both ends, this hose matches the specified connection size for the listed vehicles.

This part fits 2003-2007 Honda Accord, lower, and 2004-2007 Mitsubishi Lancer, lower. It is a practical replacement for worn, cracked, swollen, or leaking radiator hoses on those applications. The Dayco 72203 part number is also useful when searching by OE or aftermarket interchange references for the same cooling system service.

Common Problems This Hose Can Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or collapse of the original hose
• Improper hose routing after a previous repair
• Loss of coolant from a poor sealing connection at the radiator or engine side
• Cooling-system service on a Honda Accord or Mitsubishi Lancer with the correct formed hose shape

Installation Notes and Tips

Inspect the hose necks, clamps, and mating surfaces before installation. Drain coolant to a safe level, compare the new hose to the removed part for routing and length, and confirm the hose seats fully on both ends before tightening clamps. After installation, refill the cooling system and check for leaks at operating temperature.

For fitment searches, this part is commonly referenced as a lower radiator hose for 2003-2007 Honda Accord and 2004-2007 Mitsubishi Lancer applications. The Dayco 72203 should be matched to the vehicle’s cooling system layout and connection size before installation.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and performance requirements for radiator hose service. The EPDM construction and formed design reflect the needs of OE-style cooling system replacement.