21-25 Ford Bronco 2.3L & 2.7L CSF 3946 O.E.M. Style Radiator

CSF 3946 O.E.M. Style Radiator – Ford Bronco & Ranger

The CSF 3946 O.E.M. Style Radiator delivers dependable engine cooling with factory-style construction and an upgraded heavy-duty aluminum core. Designed for compatible Ford Bronco and Ranger applications, this radiator features an OEM-style plastic tank and aluminum core construction with a 30 mm core that is 7% thicker than the original 27 mm OEM core. Quick-connect inlet and outlet pipes support factory-style connections, while reinforced plastic tanks, temperature-resistant EPDM gaskets, and high-performance multi-louvered cooling fins contribute to durability and cooling efficiency. Manufactured by CSF, a radiator specialist with over 50 years of experience and more than 30 million units sold worldwide, the CSF 3946 offers a practical replacement solution for drivers seeking OEM-style fitment, upgraded core thickness, and reliable cooling system performance.

Key Features

• OEM-style replacement radiator for select 2021–2025 Ford Bronco and 2024–2026 Ford Ranger applications.
• Upgraded heavy-duty aluminum core measuring 30 mm thick, compared with the 27 mm OEM core.
• OEM-specified plastic tank and aluminum core construction.
• Virgin-grade engineered plastic tanks with glass-filled reinforcement for added strength and durability.
• Special-grade EPDM rubber gaskets designed to withstand extreme temperatures.
• High-performance, OEM-specification multi-louvered cooling fins.
• Welded-type tubes or latest-generation B-tube design, depending on application.
• Quick-connect inlet and outlet pipes.
• 100% leak-tested at 150% of operating pressure before leaving the factory.
• Radiator components installed, torqued, and tested during assembly.
• Wind tunnel testing and laboratory cooling performance validation.
• Packaging designed to meet a 10-foot drop-test standard.

Benefits

• Dependable cooling performance: The aluminum core and multi-louvered fins are designed to support effective heat transfer and reliable engine cooling.
• Upgraded core thickness: The 30 mm core is 7% thicker than the 27 mm OEM core, offering an enhanced core specification.
• Durable construction: Reinforced plastic tanks, an aluminum core, and temperature-resistant EPDM gaskets help support long-term reliability.
• Convenient replacement design: OEM-style construction and quick-connect inlet and outlet pipes help simplify installation on compatible vehicles.
• Quality assurance: Factory leak testing, assembly checks, and laboratory performance validation help ensure manufacturing quality.
• Established manufacturing experience: CSF brings over 50 years of radiator manufacturing experience and more than 30 million units sold worldwide.
• Warranty considerations: Warranty duration and coverage terms were not provided in the supplied product information. Buyers should confirm the applicable manufacturer warranty before purchase.

Product Specifications

• Brand: CSF
• Part Number: 3946
• Product Type: O.E.M. Style Radiator
• Core Material: Aluminum
• Tank Material: Plastic
• Core Length: 33 7/16 inches
• Core Width: 15 5/8 inches
• Core Thickness: 1 1/4 inches (30 mm)
• OEM Core Thickness Reference: 27 mm
• Core Rows: 1
• Flow Design: Cross-flow
• Inlet Length: 16 1/16 inches
• Inlet Width: 1 9/16 inches
• Outlet Length: 16 1/16 inches
• Outlet Width: 1 9/16 inches
• Bottom Hose Fitting: 1 1/2 inches, left
• Oil Cooler: No
• Radiator Cap Included: No
• Color: Not specified
• Box Length: 41 7/8 inches
• Box Width: 19 13/16 inches
• Box Height: 7 7/16 inches
• Box Weight: 13 lbs
• Hazardous Material: No
• Installation Style: OEM-style drop-in fit

Install Difficulty Level

Difficulty: Easy to Moderate

The CSF 3946 features an OEM-style replacement design with quick-connect inlet and outlet pipes to help make installation straightforward for a compatible vehicle. Installation is generally manageable for an experienced DIY mechanic or professional technician with the appropriate tools. The cooling system must be completely cool before work begins, and proper coolant handling, refilling, and leak checks are essential. Installation time varies with vehicle configuration, installer experience, and the condition of surrounding components.

Vehicle Fitment

• Make: Ford | Model: Bronco | Years: 2021–2025 | Engine: 2.3L L4, 2300cc, 140ci, turbocharged
• Make: Ford | Model: Bronco | Years: 2021–2025 | Engine: 2.7L V6, 164ci, turbocharged
• Make: Ford | Model: Ranger | Years: 2024–2026 | Engine: 2.3L L4, 2300cc, 140ci, turbocharged
• Make: Ford | Model: Ranger | Years: 2024–2026 | Engine: 3.0L V6, 2956cc, 181ci, turbocharged
• Make: Ford | Model: Ranger | Years: 2024–2026 | Engine: 2.7L V6, 164ci, turbocharged

Fitment Note: Confirm the vehicle's model year and engine configuration before ordering to ensure compatibility with the CSF 3946 radiator.

For questions about the CSF 3946 O.E.M. Style Radiator, vehicle compatibility, warranty coverage, or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.