CSF 3755 Radiator

CSF 3755 Radiator for Sonata Cooling Service

The CSF 3755 radiator is an OE-style replacement built for 2015-2019 Hyundai Sonata applications. It uses an aluminum core with plastic tanks and a cross-flow design to match the factory layout and cooling system connections.

For Hyundai Sonata radiator replacement needs, this unit is engineered with a 5/8 in. core thickness, 18 in. core width, and 24 5/8 in. core length. It also features a left-side 1 3/8 in. inlet and right-side 1 3/8 in. outlet, plus a quick-connect outlet pipe for factory-style fitment.

Key Features

• Fits 2015-2019 Hyundai Sonata
• CSF part number 3755
• OE-style plastic tanks with aluminum core
• Cross-flow radiator design
• 1-row core construction
• Left inlet and right outlet configuration
• No radiator cap included
• Quick-connect outlet pipe design

Detailed Description

CSF 3755 is a direct-fit radiator for the Hyundai Sonata that follows the original equipment layout with plastic end tanks and an aluminum cooling core. CSF manufactures radiators to performance-focused standards and validates cooling performance through laboratory wind tunnel testing. This radiator is built for drivers replacing a leaking, clogged, or damaged factory unit while maintaining the correct inlet and outlet orientation for the vehicle.

This part cross-references Hyundai OE 25310C2000 and OSC 13457 for the same application. If you are searching for a Hyundai Sonata radiator replacement, CSF 3755 provides the correct dimensions and connection style for 2015-2019 models.

Common Problems This Radiator Can Address

• Coolant leaks from cracked tanks or damaged seams
• Overheating caused by restricted coolant flow
• Corrosion or internal buildup in the original radiator
• Physical damage from road debris or front-end impact
• Cooling system service on a worn factory radiator

Installation Notes and Tips

Verify inlet and outlet orientation before installation: this radiator uses a left inlet and right outlet layout. Confirm the vehicle’s factory connections, hose routing, and mounting points match the OE-style design before final assembly. The radiator cap is not included, so reuse or replace the cap separately as needed.

Quality Assurance

CSF radiators are manufactured in ISO/TSO-certified facilities and built for global OE-style cooling applications. The brand has supplied radiators worldwide for decades and uses engineering validation methods to support cooling performance consistency.