The Story
CSF 3966 Radiator for Mazda 3 and CX-30
CSF 3966 is an OE-style radiator built with a plastic tank and aluminum core for select Mazda applications. It is engineered as an upgraded heavy-duty replacement with a thicker core than the original design, making it a direct-fit option for 2019-2022 Mazda 3 and 2020-2022 Mazda CX-30 models.
Key Features
- OE-style radiator construction with plastic tanks and aluminum core
- Cross flow design with one-row core
- Core thickness: 5/8 in.
- Core dimensions: 17 in. wide x 26 9/16 in. long
- Inlet diameter: 1 5/16 in., right side
- Outlet diameter: 1 5/16 in., left side
- Upgraded heavy-duty core, 42% thicker than OEM 11 mm design
- CSF part number 3966
Detailed Description
CSF 3966 radiator is designed for drivers who need a direct replacement for the factory cooling unit in select Mazda 3 and Mazda CX-30 models. The aluminum core and plastic tank layout follows OE-style construction, while the upgraded core thickness adds capacity over the original 11 mm design. CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory wind tunnel testing. This part cross-references PAF3-15-200A and PAF3-15-200B for the same application.
What This Radiator Helps Address
- Overheating caused by a worn or restricted radiator core
- Coolant leaks from aging plastic tank and core assemblies
- Reduced cooling efficiency in stop-and-go driving
- Heat buildup from a damaged or corroded factory radiator
- Replacement needs for a failed Mazda 3 radiator or Mazda CX-30 radiator
Installation Notes and Tips
Fits 2019-2022 Mazda 3, N/A. Fits 2020-2022 Mazda CX-30, N/A. Verify inlet and outlet orientation before installation: inlet is on the right and outlet is on the left. Confirm all hose connections, mounting points, and cooling system components match the original radiator before installation. CSF 3966 uses a cross flow layout and does not include a radiator cap.
Quality Assurance
CSF radiators are manufactured in ISO/TSO-certified facilities and built for global OE and aftermarket use. The brand reports more than 30 million radiators sold worldwide and uses laboratory testing to validate cooling performance.
Description
CSF 3966 Radiator for Mazda 3 and CX-30
CSF 3966 is an OE-style radiator built with a plastic tank and aluminum core for select Mazda applications. It is engineered as an upgraded heavy-duty replacement with a thicker core than the original design, making it a direct-fit option for 2019-2022 Mazda 3 and 2020-2022 Mazda CX-30 models.
Key Features
- OE-style radiator construction with plastic tanks and aluminum core
- Cross flow design with one-row core
- Core thickness: 5/8 in.
- Core dimensions: 17 in. wide x 26 9/16 in. long
- Inlet diameter: 1 5/16 in., right side
- Outlet diameter: 1 5/16 in., left side
- Upgraded heavy-duty core, 42% thicker than OEM 11 mm design
- CSF part number 3966
Detailed Description
CSF 3966 radiator is designed for drivers who need a direct replacement for the factory cooling unit in select Mazda 3 and Mazda CX-30 models. The aluminum core and plastic tank layout follows OE-style construction, while the upgraded core thickness adds capacity over the original 11 mm design. CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory wind tunnel testing. This part cross-references PAF3-15-200A and PAF3-15-200B for the same application.
What This Radiator Helps Address
- Overheating caused by a worn or restricted radiator core
- Coolant leaks from aging plastic tank and core assemblies
- Reduced cooling efficiency in stop-and-go driving
- Heat buildup from a damaged or corroded factory radiator
- Replacement needs for a failed Mazda 3 radiator or Mazda CX-30 radiator
Installation Notes and Tips
Fits 2019-2022 Mazda 3, N/A. Fits 2020-2022 Mazda CX-30, N/A. Verify inlet and outlet orientation before installation: inlet is on the right and outlet is on the left. Confirm all hose connections, mounting points, and cooling system components match the original radiator before installation. CSF 3966 uses a cross flow layout and does not include a radiator cap.
Quality Assurance
CSF radiators are manufactured in ISO/TSO-certified facilities and built for global OE and aftermarket use. The brand reports more than 30 million radiators sold worldwide and uses laboratory testing to validate cooling performance.
