CSF 3902 Radiator

OE-Style Radiator for Toyota and Lexus Hybrid Cooling

CSF 3902 is an OE-style radiator built with an aluminum core and plastic tanks for direct-fit cooling system service. It is engineered for hybrid applications across Toyota Camry, Avalon, RAV4, Venza, and Lexus ES300h and NX350h models, with fitment coverage spanning 2018-2026.

Key Features

• Aluminum core with plastic tank construction
• Cross-flow radiator design
• 5/8 in. core thickness
• Single-row core layout
• 1 1/2 in. left inlet and 1 1/2 in. right outlet
• OE-style plastic tank and aluminum core configuration
• Built for hybrid cooling system applications
• CSF part number 3902

Fitment Coverage

• Fits 2022-2026 Toyota Camry, N/A, upgraded with higher performance & stronger B-tube design.
• Fits 2021-2025 Lexus ES300h, N/A, upgraded with higher performance & stronger B-tube design.
• Fits 2022-2025 Lexus NX350h, N/A, upgraded with higher performance & stronger B-tube design.
• Fits 2022-2025 Toyota RAV4, N/A, upgraded with higher performance & stronger B-tube design.
• Fits 2022-2024 Toyota Venza, N/A.
• Fits 2022 Toyota Avalon, N/A, upgraded with higher performance & stronger B-tube design.
• Fits 2019-2021 Toyota Avalon, N/A, OE style design; hybrid.
• Fits 2018-2021 Toyota Camry, N/A, OE style design; hybrid.
• Fits 2019-2020 Lexus ES300h, N/A, OE style design; North America built.

Detailed Description

CSF 3902 is designed for hybrid cooling system service where OE-style fitment and consistent thermal performance matter. The radiator uses an aluminum core with plastic tanks, a cross-flow layout, and a 5/8 in. core thickness to match the factory-style packaging used in late-model Toyota and Lexus applications. With 1 1/2 in. left inlet and 1 1/2 in. right outlet connections, it aligns with the cooling system layout found in Camry, Avalon, RAV4, Venza, ES300h, and NX350h models. This part cross-references Bosch 13695 for the same application.

CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory wind-tunnel testing. Part number 3902 reflects that engineering approach in a direct-fit replacement for Toyota Camry and Lexus ES300h hybrid cooling service.

Common Cooling Issues It Can Address

• Coolant leaks from aging plastic tank and core assemblies
• Reduced cooling efficiency from a restricted or damaged radiator
• Overheating concerns in hybrid-specific cooling systems
• Physical damage to the radiator core or end tanks
• Fitment problems when replacing an OE-style radiator

Installation Notes and Tips

Verify inlet and outlet orientation before installation, since this radiator uses a left inlet and right outlet layout. Confirm vehicle-specific fitment by year, make, and model before removal of the original unit. Inspect hoses, clamps, and coolant condition during service, and flush the system if contamination or debris is present. Part number 3902 is intended for applications that match the listed OE-style configuration.

Quality Assurance

CSF states that its factories are ISO/TSO certified and that its radiators are engineered and tested for cooling performance validation. The brand also notes more than 50 years of production experience and over 30 million radiators sold worldwide.