Part #: 3921

CSF 3921 Radiator

⚙️ 28 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: Volkswagen, Beetle, Jetta, and Passat
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Overview of CSF Radiator 3921 for Volkswagen Vehicles

The CSF Radiator part number 3921 is designed specifically for Volkswagen models including the Beetle, Jetta, and Passat. Engineered with a durable aluminum core and plastic tanks, this radiator offers reliable cooling performance tailored to these vehicles.

  • Core thickness: 1 1/4 inches
  • Core width: 17 inches
  • Core length: 25 9/16 inches
  • Aluminum core material with plastic tanks
  • Cross flow design for efficient heat dissipation
  • Inlet and outlet diameters: 1 1/4 inches (left inlet, right outlet)
  • Single-row radiator core
  • Quick-connect inlet for ease of installation

Detailed Radiator Specifications and Features

This CSF radiator features a 1 1/4 inch thick aluminum core that measures 17 inches wide and 25 9/16 inches long, providing ample surface area for effective engine cooling. The plastic tanks are designed in an OEM style, ensuring compatibility and durability. The cross flow core type promotes efficient coolant flow from side to side, optimizing heat exchange. Both the inlet and outlet have a diameter of 1 1/4 inches, positioned on the left and right sides respectively, with inlet and outlet lengths of 17 11/16 inches and widths of 1 5/8 inches, facilitating proper hose connections. This radiator does not include a cap and is not equipped with an oil cooler.

Compatible Volkswagen Models and Applications

  • Volkswagen Beetle radiator replacement
  • Volkswagen Jetta cooling system upgrade
  • Volkswagen Passat radiator repair part
  • Replacement radiator for Volkswagen vehicles requiring a cross flow aluminum core
  • Cooling system maintenance for Volkswagen models with OEM style plastic tanks

Installation Notes and Tips

When installing the CSF radiator 3921, ensure the inlet and outlet hose connections match the 1 1/4 inch diameter specifications on the left and right sides respectively. The quick-connect inlet design simplifies attachment but verify secure fittings to prevent leaks. Since the radiator does not include a cap, reuse the existing cap or source a compatible replacement. Properly bleed the cooling system after installation to avoid air pockets and ensure optimal performance.

Quality Assurance and Warranty Information

CSF radiators are manufactured to meet OEM standards, using high-quality aluminum cores and plastic tanks for durability and corrosion resistance. This radiator is free of hazardous materials and weighs approximately 7 pounds, making it a reliable component for Volkswagen cooling systems. Warranty details should be confirmed with the distributor or manufacturer, as they may vary.

BrandCSF
Part Number3921
Core Thickness1 1/4
Core Width17
Core MaterialAluminum
Tank MaterialPlastic
Core Length25 9/16
Inlet Diameter1 1/4 left
Outlet Diameter1 1/4 right
Down Flow Or Cross Flow TypeCross flow
Radiator Core Row Quantity1
Cap IncludedNo
Box Height (in)4 1/2
Box Length (in)32
Box Weight (lbs)7
Box Width (in)20 3/16
Hazardous MaterialNo
Inlet Length (in)17 11/16
Inlet Width (in)1 5/8
Oil Cooler (in)No
Outlet Length (in)17 11/16
Outlet Width (in)1 5/8
Tech NoteO.e.m. style plastic tank & aluminum core with quick-connect inl

This part fits 28 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2022VolkswagenPassat2.0LL4N/A
2021VolkswagenPassat2.0LL4N/A
2020VolkswagenPassat2.0LL4N/A
2019VolkswagenBeetle2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2019VolkswagenPassat2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2018VolkswagenBeetle2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2018VolkswagenJetta2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2018VolkswagenJetta1.8LL4N/AOE style design ensures optimal fitment and performance.
2018VolkswagenPassat2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2017VolkswagenBeetle2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2017VolkswagenJetta1.8LL4N/AOE style design ensures optimal fitment and performance.
2017VolkswagenJetta2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2017VolkswagenPassat1.8LL4N/AOE style design ensures optimal fitment and performance.
2016VolkswagenBeetle2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2016VolkswagenJetta1.8LL4N/AOE style design ensures optimal fitment and performance.
2016VolkswagenJetta2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2016VolkswagenPassat1.8LL4N/AOE style design ensures optimal fitment and performance.
2015VolkswagenBeetle2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2015VolkswagenBeetle1.8LL4N/A
2015VolkswagenJetta2.0LL4DIESELN/AOE style design ensures optimal fitment and performance.
2015VolkswagenJetta2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2015VolkswagenJetta1.8LL4N/AOE style design ensures optimal fitment and performance.
2015VolkswagenPassat1.8LL4N/AOE style design ensures optimal fitment and performance.
2014VolkswagenBeetle2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2014VolkswagenBeetle1.8LL4N/A
2014VolkswagenJetta2.0LL4GASN/AOE style design ensures optimal fitment and performance.
2014VolkswagenJetta1.8LL4N/AOE style design ensures optimal fitment and performance.
2014VolkswagenPassat1.8LL4N/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:

134235C0121251KVW3010171

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