CSF 3626 Radiator

OE-Style Radiator for Volkswagen and Audi

The CSF 3626 radiator is an OE-style replacement built with a plastic tank and aluminum core design for direct-fit cooling service. It is engineered for vehicles that need a cross flow radiator with quick-connect inlet and outlet connections, making it a practical choice for Volkswagen Beetle, Volkswagen GTI, and Audi A3 applications.

CSF manufactures radiators to high performance standards and validates cooling performance through lab testing. The brand’s long-running radiator program covers a wide range of vehicle platforms, including many OE-style replacement designs used across import applications.

Key Features

• Part number: CSF 3626
• 1-row radiator design with aluminum core and plastic tanks
• Cross flow configuration
• Core thickness: 1 1/4 in.
• Core width: 17 in.; core length: 25 9/16 in.
• Inlet and outlet diameter: 1 1/4 in., left side
• Quick-connect inlet and outlet pipe design
• Dual cooler circuit unit with built-in separator
• Cap not included

Detailed Description

The CSF 3626 is a radiator assembly designed around OE-style plastic tanks and an aluminum core for vehicles that require a cross flow layout and left-side inlet and outlet routing. Its dimensions and connection style support direct replacement service on 2009-2013 Audi A3, 2010-2014 Volkswagen GTI, and 2012-2016 Volkswagen Beetle models. This part cross-references Carlson 13235 for the same application.

Built for cooling-system replacement work, this radiator uses a dual cooler circuit layout with a built-in separator and is intended to match the original configuration where the sensor on the core is not supplied and the original sensor must be removed and reused. The CSF 3626 is a fitment-focused solution for drivers searching for a Volkswagen GTI radiator, Audi A3 radiator, or Volkswagen Beetle radiator with OE-style construction.

Common Problems This Radiator Can Address

• Cracked or leaking radiator tanks
• Corrosion or fatigue in the original radiator core
• Cooling performance loss from restricted or damaged internal passages
• Fitment issues caused by non-OE replacement parts
• Failure of the original radiator assembly on Volkswagen and Audi platforms

Installation Notes and Tips

Verify the inlet and outlet orientation before installation, since this unit uses left-side connections. Confirm the vehicle’s original sensor transfer requirement, as the core sensor is not supplied and the original sensor must be removed and reused. Check surrounding cooling-system components, including hoses and clamps, before final assembly to help avoid repeat repairs.

Compatible With 2009-2013 Audi A3, N/A; 2010-2014 Volkswagen GTI, N/A; 2012-2016 Volkswagen Beetle, N/A.

Quality Assurance

CSF states that its factories are ISO/TSO certified and that its radiators are engineered and wind tunnel tested for cooling performance validation. The brand has supplied radiators worldwide for more than 50 years across a broad range of vehicle applications.