CSF 3439 Radiator

OE-Style Cooling for Subaru Forester

This CSF radiator is built for 2009-2013 Subaru Forester applications with an OE-style plastic tank and aluminum core design. CSF Part Number 3439 is engineered for direct-fit cooling performance in a down-flow layout, with dimensions and hose connections matched to the listed vehicle fitment.

Key Features

• Fits 2009-2013 Subaru Forester, N/A
• 1-row radiator with a 7/8-inch core thickness
• Aluminum core with plastic tanks for OE-style construction
• Down-flow design with center inlet and left outlet
• 27-inch core width and 13 7/16-inch core length
• High-efficiency plate-type oil cooler integrated into the unit
• Cap not included; CSF cap number 4540 is listed for reference

Product Details

CSF Part Number 3439 is part of the brand’s 1 Row Plastic Tank Aluminum Core line, a product line focused on OE-style radiator construction for everyday replacement needs. The radiator uses an aluminum core for heat transfer efficiency and plastic tanks to match the original equipment style used on the Subaru Forester platform. Inlet and outlet sizing are both 1 9/16 inches, with the inlet located at center and the outlet at left, supporting a direct replacement layout for the specified fitment.

CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory wind-tunnel testing. The company also supplies a broad range of radiator models across many vehicle applications, which supports consistent coverage for common replacement needs. This part cross-references Bosch 13095 and Spectra Premium CU13095 for the same application.

Common Cooling Issues This Radiator Addresses

• Overheating caused by a restricted or aging radiator core
• Coolant leaks from cracked or deteriorated plastic tanks
• Reduced heat rejection from a clogged or damaged OE radiator
• Cooling system performance loss after long-term wear
• Fitment problems when replacing a damaged Subaru Forester radiator

Installation Notes and Tips

Verify the vehicle’s radiator layout, hose routing, and connection sizes before installation. This unit is listed as a down-flow radiator with a center inlet and left outlet, so matching the original configuration is important for proper fit. The product is specified without a cap, and the OE-style design is intended to align with the factory-style cooling system used on the listed Subaru Forester applications.

Quality Assurance

CSF states that its factories are ISO/TSO certified and that its radiators are engineered for cooling performance validation. The brand also notes extensive global production experience and laboratory testing methods used to verify radiator performance.