CSF 3751 Radiator

OE-Style Radiator for Select Kia and Hyundai Models

The CSF 3751 radiator is an OE-style cooling replacement built with an aluminum core and plastic tanks for select Kia Forte and Hyundai Elantra applications. It is engineered as a cross flow radiator with a single-row core and a high-efficiency plate-type oil cooler section to support stable engine cooling in daily driving conditions.

Key Features

• Aluminum core with plastic tanks in an OEM-style design
• Cross flow construction with 1-row core layout
• Core thickness: 5/8 in.
• Inlet diameter: 1 3/8 in. left
• Outlet diameter: 1 5/16 in. right
• Integrated high-efficiency plate-type oil cooler
• Designed and tested for cooling performance validation
• CSF part number 3751

Detailed Description

CSF 3751 is a replacement radiator designed for vehicles that require an OE-style plastic tank and aluminum core configuration. The cross flow layout and single-row core help maintain efficient coolant circulation, while the built-in plate-type oil cooler adds an additional thermal management path for the application. This radiator is a direct-fit cooling component for 2014-2016 Hyundai Elantra, 2016-2017 Hyundai Elantra GT, 2015-2018 Kia Forte, 2015-2016 Kia Forte Koup, and 2015-2016 Kia Forte5. This part cross-references Bosch 13412 and Carlson 13411 for the same application. CSF 3751 is built for drivers replacing a worn or leaking radiator on a Kia Forte or Hyundai Elantra platform with an OE-style unit.

What This Radiator Helps Address

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by restricted coolant flow
• Reduced cooling efficiency from a damaged core
• Oil temperature management concerns in equipped applications
• Replacement needs after corrosion or physical damage

Installation Notes and Tips

Verify inlet and outlet orientation before installation, as this radiator uses a left-side inlet and right-side outlet configuration. Confirm vehicle fitment by year and model before ordering, especially for Hyundai Elantra, Hyundai Elantra GT, Kia Forte, Kia Forte Koup, and Kia Forte5 applications. Inspect hoses, clamps, and coolant condition during replacement to help ensure proper sealing and system performance. Cap is not included.

Quality Assurance

CSF manufactures radiators to high-performance standards in ISO/TSO-certified facilities and validates cooling performance through laboratory wind tunnel testing. The brand has supplied radiators worldwide for more than 50 years across a broad range of vehicle applications.