Denso 221-3707 Radiator

Denso 221-3707 Radiator for Hyundai Elantra

The Denso 221-3707 radiator is an OE-style cooling replacement built for 2007-2012 Hyundai Elantra applications. It uses Denso’s OE supplier experience to deliver the correct fitment, stable cooling performance, and dependable operation for daily driving.

Key Features

• Direct-fit radiator for 2007-2012 Hyundai Elantra
• Core dimensions: 23.6250 in. height, 17.5000 in. width, 0.6250 in. thickness
• Transmission oil cooler included
• Inlet diameter: 0.9370 in.
• Outlet diameter: 0.9370 in.
• Built to meet OE-style configuration, tank, fin pitch, and material standards

Detailed Description

Denso 221-3707 is a radiator engineered for the Hyundai Elantra cooling system, with dimensions and connection sizes that support proper installation and heat transfer. Denso designs its radiators to match OE manufacturer requirements for core construction, tank design, and fin spacing, helping maintain consistent engine temperature control under normal and demanding driving conditions. If you are replacing a worn or leaking radiator on a 2007-2012 Hyundai Elantra, this part number 221-3707 provides a focused OE replacement option.

This part cross-references Hyundai 25310-2H000 and 25310-2H050 for the same application.

What It Helps Solve

• Engine overheating caused by a restricted or failing radiator
• Coolant loss from cracked tanks or damaged core sections
• Transmission cooling concerns when the radiator-mounted cooler is part of the system
• Poor heat dissipation from an aging or corroded radiator
• Fitment issues when replacing the original Hyundai Elantra radiator

Installation Notes and Tips

Verify inlet and outlet hose sizes before installation and compare the original radiator to Denso 221-3707 for mounting and connection alignment. Flush the cooling system, inspect hoses and clamps, and confirm the transmission cooler lines are clean and properly seated if equipped on your vehicle. For 2007-2012 Hyundai Elantra models, matching the OE-style radiator configuration helps reduce installation issues and supports proper cooling system function.

Quality Assurance

Denso supplies radiators to OE car makers worldwide, and this radiator is built using the company’s OE-focused engineering standards. Each unit is subjected to durability and function testing to support reliable performance and fitment in Hyundai Elantra applications.