CSF 3961 Radiator

CSF 3961 Radiator for Ford Bronco

The CSF 3961 is an OE-style radiator built for 2022-2025 Ford Bronco applications. It uses an aluminum core with plastic tanks and quick-connect inlet and outlet pipes, with an upgraded heavy-duty core that is 7% thicker than the OEM 27mm design.

Engineered and wind tunnel tested for cooling performance validation, this radiator is built to meet the demands of daily driving and heat management in the Ford Bronco platform. The CSF 3961 combines factory-style fitment with a reinforced core design for a direct replacement solution.

Key Features

• Fits 2022-2025 Ford Bronco, N/A
• CSF part number 3961
• OE-style plastic tank and aluminum core construction
• Upgraded heavy-duty core, 30mm thick vs. OEM 27mm
• Cross-flow radiator design
• Quick-connect inlet and outlet pipe design
• Single-row core configuration
• Inlet diameter: 1 1/2 right
• Outlet diameter: 1 1/2 left

Detailed Description

Built for the Ford Bronco cooling system, the CSF 3961 radiator measures 33 7/16 inches in core length, 15 5/8 inches in core width, and 1 3/16 inches in core thickness. The aluminum core and plastic tank layout follows an OE-style configuration while the thicker heavy-duty core adds additional cooling capacity over the factory 27mm unit. This radiator is a direct-fit replacement for 2022, 2023, 2024, and 2025 Ford Bronco models listed in the fitment data.

CSF manufactures radiators to high-performance standards and validates cooling performance through lab testing. Part number 3961 is also cross-referenced with FO3010377 and NB3Z 8005 A for the same application.

What This Radiator Helps Address

• Overheating caused by a worn or restricted radiator core
• Coolant temperature instability during stop-and-go driving
• Reduced cooling efficiency from age-related tank or core wear
• Leak concerns associated with deteriorated radiator components
• Replacement needs after impact damage or corrosion

Installation Notes and Tips

Verify inlet and outlet orientation before installation: inlet is on the right and outlet is on the left. This radiator uses quick-connect pipe connections and does not include a radiator cap. Confirm all hose routing, mounting points, and cooling system condition before filling and bleeding the system.

Quality Assurance

CSF radiators are manufactured in ISO/TSO-certified facilities and tested for cooling performance validation. The brand has supplied radiators worldwide for more than 50 years and has produced over 30 million units across more than 10,000 radiator models.