CSF 3889 Radiator
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CSF

CSF 3889 Radiator

Brand CSF 3889
Core Thickness 5/8
Core Width 14 5/8
Core Material Aluminum
Tank Material Plastic
Core Length 26
Inlet Diameter 1 9/16 right
Outlet Diameter 1 9/16 left
Down Flow Or Cross Flow Type Cross flow
Radiator Core Row Quantity 1
Cap Included No
Box Height (in) 7 1/4
Box Length (in) 32 7/16
Box Weight (lbs) 8
Box Width (in) 20 3/16
Hazardous Material No
Inlet Length (in) 15 1/2
Inlet Width (in) 1 5/16
Oil Cooler (in) No
Outlet Length (in) 15 1/2
Outlet Width (in) 1 5/16
Tech Note O.e.m. style plastic tank & aluminum core.
Fits Subaru · 13 vehicles

OEM-style construction. Plastic tanks and an aluminum core match the original design.

Cross-flow design. Promotes efficient coolant flow through the radiator.

Single-row core. Helps keep the radiator compact and lightweight.

Cross-references Bosch 13748, 45111FL00B and 45111FL001 for the same application. See all 5.

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OE-Style Radiator for Subaru Cooling Service

CSF 3889 is an OE-style radiator built with an aluminum core and plastic tanks for direct replacement cooling service. It is listed for Subaru Crosstrek and Subaru Impreza applications with fitment-specific notes for the 2021-2023 and 2022-2023 model years.

Key Features

  • Aluminum core with plastic tank construction
  • Cross-flow radiator design
  • Single-row core layout
  • Core dimensions: 26 in. length, 14 5/8 in. width, 5/8 in. thickness
  • 1 9/16 in. inlet on the right side and 1 9/16 in. outlet on the left side
  • OE-style plastic tank and aluminum core construction
  • Part number: CSF 3889

Detailed Description

CSF 3889 is a replacement radiator engineered around OE-style construction, using a plastic tank and aluminum core layout to match the factory cooling system design. The cross-flow configuration, single-row core, and side-specific inlet and outlet placement support proper routing in Subaru cooling systems. This radiator is listed for 2022-2023 Subaru Crosstrek and 2021-2023 Subaru Impreza with an upgraded heavy-duty core note for those later applications, and for 2018-2021 Subaru Crosstrek plus 2017-2020 Subaru Impreza with OE-style fitment. CSF 3889 also cross-references Bosch 13748 for the same application.

Vehicle Fitment

  • Fits 2022-2023 Subaru Crosstrek, N/A. Upgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm.
  • Fits 2021-2023 Subaru Impreza, N/A. Upgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm.
  • Fits 2018-2021 Subaru Crosstrek, N/A. OE style design ensures optimal fitment and performance.
  • Fits 2017-2020 Subaru Impreza, N/A. OE style design ensures optimal fitment and performance.

Common Cooling Issues Addressed

  • Cracked or leaking radiator tanks
  • Corrosion or damage in the radiator core
  • Restricted coolant flow from an aging radiator
  • Overheating caused by reduced heat transfer
  • Fitment problems from a non-OE-style replacement radiator

Installation Notes

Verify inlet and outlet orientation before installation: 1 9/16 in. inlet on the right and 1 9/16 in. outlet on the left. Confirm core dimensions and vehicle application against the existing radiator before removal. Cap is not included.

Quality Assurance

CSF 3889 follows OE-style radiator construction with an aluminum core and plastic tanks for application-specific replacement use. The listed fitment and dimensional details support accurate selection for Subaru Crosstrek and Subaru Impreza cooling system service.

Related reading

This part fits 13 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2023SubaruCrosstrek2.5LH4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2023SubaruImpreza2.0LH4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2022SubaruCrosstrek2.5LH4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2022SubaruImpreza2.0LH4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2021SubaruCrosstrek2.0LH4N/AOE style design ensures optimal fitment and performance.
2021SubaruImpreza2.0LH4N/AUpgraded Heavy Duty Core. 29% Thicker 15.5mm vs OEM 12mm
2020SubaruCrosstrek2.0LH4N/AOE style design ensures optimal fitment and performance.
2020SubaruImpreza2.0LH4N/AOE style design ensures optimal fitment and performance.
2019SubaruCrosstrek2.0LH4N/AOE style design ensures optimal fitment and performance.
2019SubaruImpreza2.0LH4N/AOE style design ensures optimal fitment and performance.
2018SubaruCrosstrek2.0LH4N/AOE style design ensures optimal fitment and performance.
2018SubaruImpreza2.0LH4N/AOE style design ensures optimal fitment and performance.
2017SubaruImpreza2.0LH4N/AOE style design ensures optimal fitment and performance.
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 1374845111FL00B45111FL001SU3010664SU3010666