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CSF 3931 Radiator
| Brand | CSF 3931 |
|---|---|
| Core Thickness | 1 1/4 |
| Core Width | 18 5/16 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 18 11/16 |
| Inlet Diameter | 1 3/8 left |
| Outlet Diameter | 1 3/8 right |
| Down Flow Or Cross Flow Type | Cross flow |
| Box Height (in) | 5 1/16 |
| Box Length (in) | 24 9/16 |
| Box Weight (lbs) | 8 |
| Box Width (in) | 22 3/8 |
| Hazardous Material | No |
| Inlet Length (in) | 19 |
| Inlet Width (in) | 1 9/16 |
| No. Of Rows | 1 |
| Oil Cooler (in) | No |
| Outlet Length (in) | 19 |
| Outlet Width (in) | 1 9/16 |
| Radiator Cap Supplied | No |
| Tech Note | O.e.m. style plastic tank & aluminum core with quick-connect inle |
| Fits | Hyundai · 4 vehicles |
OE-style design. Plastic tank and aluminum core with quick-connect inlet and outlet pipes.
Cross-flow construction. Engineered for efficient cooling performance validation.
ISO/TSO certified. Built in certified factories and sold worldwide for decades.
Cross-references Dorman - HELP 13854, 25310-L0000 and HY3010226 for the same application. See all 3.
CSF 3931 Radiator for Hyundai Sonata
CSF 3931 is an OE-style radiator built for the 2020-2023 Hyundai Sonata. It uses an aluminum core with plastic tanks and a cross-flow design to match the factory cooling layout, with quick-connect inlet and outlet pipe connections for straightforward replacement.
Key Features
- Fits 2020-2023 Hyundai Sonata
- Part number: CSF 3931
- Cross-flow radiator design
- Aluminum core with plastic tank construction
- Core thickness: 1 1/4 in.
- Core dimensions: 18 5/16 in. wide x 18 11/16 in. long
- 1 3/8 in. left inlet and 1 3/8 in. right outlet
- Quick-connect inlet and outlet pipe style
- OEM-style replacement layout
Detailed Description
CSF 3931 is engineered as a direct-fit radiator for the Hyundai Sonata, 2020-2023, with dimensions and connection points arranged to follow the original cooling system layout. The aluminum core helps transfer heat efficiently, while the plastic tank design mirrors common OE construction for this application. CSF states its radiators are manufactured to high-performance standards and validated through laboratory wind-tunnel testing, supporting consistent cooling performance across a wide range of vehicle applications. This part number, CSF 3931, is a practical choice when replacing a leaking, clogged, or damaged radiator on a Hyundai Sonata.
This part cross-references Dorman - HELP 13854 for the same application.
What This Radiator Helps Address
- Coolant leaks from a cracked or aging radiator tank
- Restricted coolant flow caused by internal buildup or corrosion
- Engine temperature rise from reduced heat exchange
- Damage to the original radiator core from road debris or wear
- Cooling system service needs on a 2020-2023 Hyundai Sonata
Installation Notes and Tips
Verify inlet and outlet orientation before installation: this radiator uses a 1 3/8 in. left inlet and 1 3/8 in. right outlet. Confirm the quick-connect pipe style matches the vehicle’s factory connections and inspect hoses, clamps, and coolant condition before reassembly. Always refill and bleed the cooling system according to Hyundai service procedures after installation.
Quality Assurance
CSF manufactures radiators in ISO/TSO-certified facilities and supplies a broad range of radiator applications worldwide. The brand’s manufacturing process includes engineering validation for cooling performance, and this radiator follows an OEM-style plastic tank and aluminum core design for the listed Hyundai Sonata fitment.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2023 | Hyundai | Sonata | 1.6L | L4 | N/A | — |
| 2022 | Hyundai | Sonata | 1.6L | L4 | N/A | — |
| 2021 | Hyundai | Sonata | 1.6L | L4 | N/A | — |
| 2020 | Hyundai | Sonata | 1.6L | L4 | N/A | — |
| No rows match your filter. | ||||||