CSF 3837 Radiator

CSF 3837 Radiator for Toyota Prius

The CSF 3837 is a 1-row all-aluminum radiator built for the 2004-2009 Toyota Prius. It uses an OEM-style all-aluminum tank and core design with cross-flow construction for direct-fit cooling system service.

Key Features

• 1-row all-aluminum radiator construction
• Core thickness: 5/8 in.
• Core dimensions: 23 5/8 in. length x 13 5/8 in. width
• Cross-flow design with 1 1/4 in. inlet on the left and 1 1/4 in. outlet on the right
• OEM-style all-aluminum tanks and core model
• Cap not included
• CSF cap number: 4513

Detailed Description

Built by CSF, part number 3837 is engineered as an OEM-style replacement radiator for the Toyota Prius cooling system. The aluminum core and aluminum tanks provide a lightweight, corrosion-resistant construction, while the single-row cross-flow layout supports efficient coolant transfer in a compact package. CSF manufactures a wide range of radiator designs and validates cooling performance through laboratory wind tunnel testing, with production backed by ISO/TSO-certified factories.

This CSF 3837 radiator is a direct-fit solution for 2004-2009 Toyota Prius models and is listed with a 13 psi micro cap requirement. It is a practical choice for drivers replacing a leaking, clogged, or damaged radiator in a Toyota Prius, while maintaining the original-style layout and hose connection orientation.

This part cross-references APDI 8012758 for the same application.

What It Is Used For

• Replacing a leaking radiator tank or core
• Restoring coolant flow after internal clogging
• Addressing overheating caused by radiator damage
• Replacing a corroded or aging OEM-style radiator
• Servicing a Toyota Prius cooling system with the correct inlet and outlet orientation

Installation Notes and Tips

• Compatible With 2004-2009 Toyota Prius, N/A.
• Use a micro 13 psi cap as noted in the fitment details.
• Verify inlet and outlet placement before installation: 1 1/4 in. left inlet and 1 1/4 in. right outlet.
• Confirm hose routing and mounting points against the original radiator before final assembly.
• Cap is not included with this radiator.

Quality Assurance

CSF radiators are manufactured to high-performance standards in ISO/TSO-certified facilities and are engineered for cooling performance validation. Part number 3837 reflects CSF’s OEM-style all-aluminum radiator design for the Toyota Prius application.