CSF 3823 Radiator

CSF 3823 Radiator for Toyota Sienna

CSF 3823 is an OE-style radiator built with a plastic tank and aluminum core layout for the 2017-2020 Toyota Sienna. It is engineered for direct replacement service where dependable coolant flow and factory-style fitment matter.

Key Features

• Fits 2017-2020 Toyota Sienna
• 1-row down-flow radiator design
• Plastic tank and aluminum core construction
• Core thickness: 1 1/4 in.
• Core size: 29 11/16 in. wide x 17 11/16 in. long
• Inlet diameter: 1 3/8 in. left
• Outlet diameter: 1 3/8 in. right
• Integrated high-efficiency plate-type oil cooler
• OE-style tank and core configuration
• CSF part number 3823

Product Details

This CSF radiator is designed around the factory-style cooling layout used on the Toyota Sienna, with a single-row aluminum core and plastic end tanks. CSF manufactures radiators to high-performance standards and validates cooling performance through wind tunnel testing, supporting consistent thermal management in everyday driving conditions. The radiator’s down-flow design, left-side inlet, and right-side outlet match the listed application, while the built-in plate-type oil cooler adds an important OE-style feature for vehicles equipped with that setup. If you are searching for a Toyota Sienna radiator replacement, CSF 3823 provides a direct-fit solution for 2017, 2018, 2019, and 2020 models.

This part cross-references Carlson 13663 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from aging plastic tanks or core seams
• Overheating caused by restricted or inefficient heat transfer
• Cracked or brittle radiator end tanks
• Reduced cooling performance in stop-and-go driving
• Failure of the original radiator’s integrated oil cooler section

Installation Notes and Tips

Confirm the inlet and outlet orientation before installation: inlet is 1 3/8 in. left and outlet is 1 3/8 in. right. This radiator does not include a cap, and the listed CSF cap number is 4514. Verify hose routing, mounting points, and the vehicle’s cooling system condition before final assembly. For best results, flush the cooling system and inspect related hoses, clamps, and the thermostat during radiator replacement.

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 offers a broad catalog of more than 10,000 radiator models across leading vehicle platforms.