CSF 3858 Radiator

OE-Style Radiator for Toyota and Lexus Applications

CSF 3858 is an OE-style radiator built with an aluminum core and plastic tanks for direct replacement service on select Toyota and Lexus vehicles. It uses a cross-flow layout with 1 1/2-inch left inlet and 1 1/2-inch right outlet connections, plus a single-row core for a factory-style fit.

For drivers searching for a radiator for Toyota RAV4, Camry, Avalon, Venza, or Lexus ES and NX models, CSF 3858 provides the dimensions and connection layout needed for a straightforward replacement. The upgraded B-tube core design adds a stronger performance-focused construction while keeping the OE-style tank-and-core format.

Key Features

• CSF part number 3858
• OE-style plastic tanks with aluminum core construction
• Cross-flow radiator design
• Core thickness: 5/8 in.
• Single-row core
• Inlet: 1 1/2 in. left
• Outlet: 1 1/2 in. right
• Upgraded with higher performance and stronger B-tube design
• Direct-fit dimensions for select Toyota and Lexus vehicles

Detailed Description

CSF 3858 is engineered as a replacement radiator for 2022-2025 Toyota RAV4, 2022-2024 Toyota Camry, 2022 Toyota Avalon, 2021 Toyota Venza, 2021-2024 Lexus ES250, 2021-2024 Lexus ES350, 2022-2025 Lexus NX250, and 2024-2025 Lexus NX350 applications. It also covers earlier Toyota Avalon, Toyota Camry, Toyota RAV4, and Lexus ES350 fitments listed in the application data. The radiator follows an OE-style plastic tank and aluminum core layout, with a cross-flow configuration that matches the factory-style hose routing and mounting requirements for these vehicles.

This CSF 3858 radiator is a practical choice for owners needing a replacement radiator for Toyota Camry cooling system service, a Toyota RAV4 radiator replacement, or a Lexus ES350 radiator repair. Interchange references include Dorman HELP 13670 and Spectra Premium CU13670 for the same application.

What This Radiator Helps Address

• Coolant leaks from cracked or aged radiator tanks
• Reduced cooling efficiency from a restricted or damaged core
• Overheating caused by internal radiator wear
• Fitment issues when replacing a factory-style radiator
• Cooling system service on high-mileage Toyota and Lexus vehicles

Installation Notes and Tips

Verify inlet and outlet orientation before installation, since this radiator uses a left-side inlet and right-side outlet layout. Confirm core dimensions and mounting points against the original unit before removal, and inspect hoses, clamps, and related cooling system components during replacement. Proper coolant fill and system bleeding are important after installation to restore normal operating temperature.

Quality Assurance

CSF 3858 uses an OE-style construction with plastic tanks and an aluminum core, along with an upgraded B-tube design for added strength in the core structure. The part is listed as non-hazardous and does not include a radiator cap.