Part #: 3923

CSF 3923 Radiator

⚙️ 14 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Hyundai and Kia, Seltos, Soul, and Veloster
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Radiator Replacement for Hyundai and Kia Vehicles

The CSF 3923 radiator is engineered to provide efficient cooling performance for select Hyundai and Kia models. Designed with a durable aluminum core and plastic tanks, this radiator supports optimal engine temperature management for vehicles like the Hyundai Seltos, Kia Soul, and Hyundai Veloster.

  • Core thickness: 5/8 inch for effective heat dissipation
  • Core dimensions: 16 inches wide by 23 15/16 inches long
  • Aluminum core material for lightweight durability
  • Plastic tank construction matching OEM style
  • Cross flow design with 1-row radiator core
  • Inlet and outlet diameters: 1 5/16 inches (left inlet, right outlet)
  • Includes a high-efficiency plate type oil cooler measuring 10 13/16 inches
  • Cap not included

Detailed Radiator Specifications and Design

The CSF 3923 radiator features a cross flow core design that enhances coolant flow and heat exchange efficiency. Its aluminum core provides a balance of strength and thermal conductivity, while the plastic tanks replicate OEM specifications to ensure proper fit and function. The radiator core measures 16 inches in width and nearly 24 inches in length, with a thickness of 5/8 inch, supporting effective engine cooling. Both the inlet and outlet have a diameter of 1 5/16 inches, positioned on the left and right sides respectively, facilitating straightforward hose connections. Additionally, the integrated high-efficiency plate type oil cooler improves overall engine cooling performance, particularly under demanding conditions.

Compatible Vehicles and Common Applications

This radiator is compatible with the following vehicles:

  • Hyundai Seltos
  • Kia Soul
  • Hyundai Veloster

It is designed to address common radiator-related issues such as:

  • Engine overheating due to coolant leaks or blockages
  • Reduced cooling efficiency from damaged or corroded cores
  • Cracked or warped plastic tanks causing coolant loss
  • Oil cooler failures affecting engine temperature regulation
  • Incompatible or worn radiators causing poor fitment and leaks

Installation Notes and Tips

When installing the CSF 3923 radiator, ensure all hose connections match the 1 5/16 inch inlet and outlet diameters for a secure fit. Verify the cross flow orientation aligns with the vehicle’s cooling system layout. Since the radiator does not include a cap, reuse the existing cap or source a compatible replacement. Inspect all mounting points and brackets for proper alignment to avoid stress on the radiator core and tanks during operation.

Quality Assurance and Warranty Information

CSF radiators are manufactured to meet OEM standards, featuring high-quality aluminum cores and durable plastic tanks. The CSF 3923 radiator undergoes rigorous testing to ensure reliable performance and longevity. While specific warranty details are not provided here, CSF products typically come with a limited warranty covering defects in materials and workmanship. Consult the product documentation or manufacturer for exact warranty terms.

BrandCSF
Part Number3923
Core Thickness5/8
Core Width16
Core MaterialAluminum
Tank MaterialPlastic
Core Length23 15/16
Inlet Diameter1 5/16 left
Outlet Diameter1 5/16 right
Down Flow Or Cross Flow TypeCross flow
Radiator Core Row Quantity1
Cap IncludedNo
Box Height (in)5 1/2
Box Length (in)33 3/16
Box Weight (lbs)8
Box Width (in)20
Hazardous MaterialNo
Inlet Length (in)16 5/8
Inlet Width (in)1 3/8
Oil Cooler (in)10 13/16 (high-effeciency plate type)
Outlet Length (in)16 5/8
Outlet Width (in)1 3/8
Tech NoteO.e.m. style plastic tank & aluminum core.

This part fits 14 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2025KiaSeltos2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2025KiaSoul2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2024KiaSeltos2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2024KiaSoul2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2023KiaSeltos2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2023KiaSoul2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2022KiaSeltos2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2022KiaSoul2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2021HyundaiVeloster2.0LL4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2021KiaSeltos2.0LL4N/AOE style design ensures optimal fitment and performance.
2021KiaSoul2.0LL4N/AOE style design ensures optimal fitment and performance.
2020HyundaiVeloster2.0LL4N/AOE style design ensures optimal fitment and performance.
2020KiaSoul2.0LL4N/AOE style design ensures optimal fitment and performance.
2019HyundaiVeloster2.0LL4N/AOE style design ensures optimal fitment and performance.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

137961386225310-J300025310-J3050HY3010228KI3010170

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.