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CSF 3933 Radiator
| Brand | CSF 3933 |
|---|---|
| Core Thickness | 5/8 |
| Core Width | 15 5/8 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 25 1/16 |
| Inlet Diameter | 1 3/8 right |
| Outlet Diameter | 1 3/8 left |
| Down Flow Or Cross Flow Type | Cross flow |
| Box Height (in) | 6 5/8 |
| Box Length (in) | 32 7/16 |
| Box Weight (lbs) | 9 |
| Box Width (in) | 22 15/16 |
| Hazardous Material | No |
| Inlet Length (in) | 16 1/16 |
| Inlet Width (in) | 1 3/8 |
| No. Of Rows | 1 |
| Oil Cooler (in) | No |
| Outlet Length (in) | 16 1/16 |
| Outlet Width (in) | 1 3/8 |
| Radiator Cap Supplied | No |
| Tech Note | O.e.m. style plastic tank & aluminum core with quick-connect outl |
| Fits | Hyundai and Kia · 8 vehicles |
OE-style design. Plastic tank and aluminum core with quick-connect outlet pipe.
Heavy-duty core. 11% thicker than OEM for added cooling capacity.
Cross-flow radiator. Engineered for efficient airflow and cooling performance.
Cross-references Bosch 13709, 25310-E6100 and HY3010223 for the same application. See all 3.
CSF 3933 Radiator for Kia Optima and Hyundai Sonata
CSF 3933 is an OE-style replacement radiator built with an aluminum core and plastic tanks for select Kia and Hyundai applications. It is engineered as an upgraded heavy-duty core with a 15.5 mm thickness, compared with the OEM 14 mm design, for added cooling capacity in the same fitment envelope.
Key Features
- Aluminum core with plastic tank construction
- Cross-flow radiator design
- Single-row core layout
- Inlet and outlet size: 1 3/8 in.
- Quick-connect outlet pipe design
- Upgraded heavy-duty core thickness: 15.5 mm vs. OEM 14 mm
- OE-style fitment for select Kia Optima and Hyundai Sonata models
Detailed Description
CSF part number 3933 is a radiator designed for cooling-system replacement on 2017-2020 Kia Optima and 2016-2019 Hyundai Sonata models. The radiator uses an aluminum core for heat transfer efficiency and plastic tanks for OE-style packaging and fitment. Its cross-flow layout and 1 3/8 in. inlet and outlet dimensions match the listed applications, while the thicker core provides an upgraded heavy-duty design for drivers replacing a worn or damaged factory radiator. CSF manufactures a wide range of radiator applications and validates cooling performance through laboratory wind-tunnel testing. This part cross-references Bosch 13709 for the same application.
Vehicle Fitment
- Fits 2017-2020 Kia Optima, N/A. Notes: Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm
- Fits 2016-2019 Hyundai Sonata, N/A. Notes: Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm
Common Replacement Reasons
- Leaking radiator tanks or core
- Reduced coolant flow from age or corrosion
- Overheating caused by restricted heat exchange
- Cracked plastic end tanks or damaged fittings
- Cooling-system service after radiator failure
Installation Notes and Tips
Verify inlet and outlet orientation before installation, as this radiator uses a right-side inlet and left-side outlet configuration. Confirm the vehicle’s original radiator dimensions and quick-connect outlet pipe style against the listed specifications for 2017-2020 Kia Optima and 2016-2019 Hyundai Sonata applications. Inspect hoses, clamps, and coolant condition during replacement to help complete the repair correctly.
Quality Assurance
CSF radiators are manufactured to high-performance standards in ISO/TSO-certified facilities and are engineered for cooling performance validation. Part number 3933 reflects CSF’s OE-style approach to radiator replacement for Kia Optima and Hyundai Sonata applications.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2020 | Kia | Optima | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm |
| 2019 | Hyundai | Sonata | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm |
| 2019 | Kia | Optima | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm |
| 2018 | Hyundai | Sonata | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm |
| 2018 | Kia | Optima | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm |
| 2017 | Hyundai | Sonata | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm |
| 2017 | Kia | Optima | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm |
| 2016 | Hyundai | Sonata | 2.0L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Upgraded Heavy Duty Core. 11% Thicker 15.5mm vs OEM 14mm |
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