Home› Belts and Cooling > Radiators, Coolers and Related Components› CSF 3889 Radiator
CSF 3889 RadiatorOE Quality 60-Day Returns
Part #: 3889

CSF 3889 Radiator

13 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$96.16Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Subaru, Crosstrek and Impreza
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? See all Radiator options

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.

BrandCSF
Part Number3889
Core Thickness5/8
Core Width14 5/8
Core MaterialAluminum
Tank MaterialPlastic
Core Length26
Inlet Diameter1 9/16 right
Outlet Diameter1 9/16 left
Down Flow Or Cross Flow TypeCross flow
Radiator Core Row Quantity1
Cap IncludedNo
Box Height (in)7 1/4
Box Length (in)32 7/16
Box Weight (lbs)8
Box Width (in)20 3/16
Hazardous MaterialNo
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 NoteO.e.m. style plastic tank & aluminum core.

This part fits 13 vehicles. Search below:

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.

* 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:

1374845111FL00145111FL00BSU3010664SU3010666

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

Related Articles