CSF 3406 Radiator

OE-Style Cooling for Hyundai and Kia

CSF 3406 is a cross flow radiator built with a 1-row aluminum core and plastic tanks in an OE-style layout. It is engineered for direct replacement use on select Hyundai Azera, Hyundai Sonata, and Kia Optima applications, with fitment coverage for 2006-2011 model years.

The CSF 1 Row Plastic Tank Aluminum Core line focuses on factory-style construction and validated cooling performance. CSF states its radiators are engineered and wind tunnel tested for cooling validation, and the brand supplies a wide range of radiator designs for many vehicle platforms.

Key Features

• Part number: CSF 3406
• 1-row aluminum core for efficient heat transfer
• Plastic tank construction in an OE-style design
• Cross flow radiator layout
• Core thickness: 5/8 in.
• Inlet: 1 3/8 in. right side
• Outlet: 1 3/8 in. left side
• Oil cooler: 14 3/4 in. high-efficiency concentric type
• Multifit model for listed applications

Detailed Description

CSF 3406 is a replacement radiator designed around factory-style dimensions and connections, including a 19 in. core width, 25 1/16 in. core length, and 19 in. inlet and outlet lengths. The aluminum core and plastic tank design follows an OEM-style configuration for select Hyundai and Kia vehicles, including 2008-2010 Hyundai Sonata, 2010-2011 Hyundai Azera, and 2006-2010 Kia Optima. This part cross-references Spectra Premium CU2831 and CU13060 for the same application.

What This Radiator Helps Address

• Overheating caused by a restricted or failing radiator core
• Coolant leaks from aging plastic tank and core assemblies
• Reduced heat rejection from a damaged or clogged radiator
• Temperature instability in daily-driven Hyundai Sonata, Hyundai Azera, and Kia Optima models
• Replacement needs after corrosion, impact damage, or internal blockage

Installation Notes and Tips

Verify inlet and outlet orientation before installation: this radiator uses a right-side inlet and left-side outlet. Confirm the vehicle uses the listed OE-style design and a 16 psi micro cap specification where required by the application notes. Inspect hoses, clamps, and the cooling system for contamination or wear before installing the new radiator. Always refill and bleed the system according to the vehicle service procedure.

Quality Assurance

CSF manufactures radiators to high-performance standards in ISO/TSO-certified facilities and validates cooling performance through laboratory testing. The brand has supplied radiators worldwide for more than 50 years and offers extensive coverage across many vehicle platforms, including Hyundai Sonata, Hyundai Azera, and Kia Optima applications.