Denso 221-3608 Radiator
OE Quality 60-Day Returns
Denso

Denso 221-3608 Radiator

Brand Denso 221-3608
Core Height 13.7500
Core Thickness 1.0000
Core Width 27.5000
Inlet Diameter 1.1250
Outlet Diameter 1.5000
Transmission Oil Cooler Included YES
Fits Subaru · 4 vehicles

OE experience. Built to OE standards for reliable performance and fit.

Radiator performance. Helps maintain proper engine cooling and function.

Transmission oil cooler included. Adds integrated cooling support in one unit.

Cross-references APDI 8012465, CSF 3310 and DPI Performance Racing Products 2465 for the same application. See all 9.

$165.07Free shipping
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Denso 221-3608 Radiator for Subaru Outback

The Denso 221-3608 radiator is built for 2001-2004 Subaru Outback applications and follows OE-style dimensions for proper cooling system fitment. With an integrated transmission oil cooler and matched inlet and outlet sizing, it supports dependable engine temperature control in daily driving and demanding conditions.

  • Fits 2001-2004 Subaru Outback
  • Core height: 13.7500 in.
  • Core width: 27.5000 in.
  • Core thickness: 1.0000 in.
  • Transmission oil cooler included: Yes
  • Inlet diameter: 1.1250 in.
  • Outlet diameter: 1.5000 in.

OE-Style Cooling Performance

Denso radiators are engineered from OE supplier experience, with configurations, tank design, fin pitch, core dimensions, and materials selected to meet original manufacturer standards. The 221-3608 is a direct-fit radiator for Subaru Outback models from 2001 through 2004, making it a practical replacement when the original unit shows signs of age or cooling inefficiency. This part number, 221-3608, is also cross-referenced to Subaru 45111-AE06A for the same application.

Common Cooling System Issues

  • Engine running hotter than normal
  • Coolant leaks from a damaged or corroded radiator
  • Transmission fluid temperature concerns when the cooler circuit is affected
  • Restricted coolant flow from internal buildup
  • Fitment problems caused by a mismatched replacement radiator

Installation Notes

Verify radiator dimensions, inlet and outlet locations, and transmission cooler connections before installation. Flush the cooling system, inspect hoses and clamps, and confirm proper coolant fill and bleed procedures after replacement. The Denso 221-3608 is intended for Subaru Outback fitment from 2001-2004, so matching the vehicle year and cooling configuration is important before installation.

Quality Assurance

Denso subjects its radiators to durability and function testing to confirm performance under demanding operating conditions. As an OE radiator supplier, Denso applies manufacturing standards focused on fitment consistency, cooling efficiency, and long-term reliability for Subaru Outback applications.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2004SubaruOutbackN/A—
2003SubaruOutbackN/A—
2002SubaruOutbackN/A—
2001SubaruOutbackN/A—
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
APDI — 8012465CSF — 3310DPI Performance Racing Products — 2465OSC — 2465Reach Cooling — 41-2465Spectra Premium — CU2465Subaru — 45111-AE06ATYC Cooling - Archived — 2465Vista Pro — 431491