Denso 221-3513 Radiator
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Denso

Denso 221-3513 Radiator

Brand Denso 221-3513
Core Height 16.8750
Core Thickness 1.0000
Core Width 25.7500
Transmission Oil Cooler Included Yes
Inlet Diameter 1.5000
Outlet Diameter 1.5000
Fits Mazda · 3 vehicles

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

Durability tested. Passes rigorous function testing for dependable cooling under demanding conditions.

Transmission oil cooler included. Adds integrated cooling support in one radiator assembly.

Cross-references APDI 8013089, CSF 3410 and DPI Performance Racing Products 13088 for the same application. See all 11.

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Denso 221-3513 Radiator for Mazda 6

The Denso 221-3513 radiator is a direct-fit cooling system component for 2009-2010 Mazda 6 models. Built to OE-level dimensions and materials, it supports stable engine temperature control and consistent heat transfer in everyday driving and demanding conditions.

  • Fits 2009-2010 Mazda 6, N/A
  • Core height: 16.8750 in.
  • Core width: 25.7500 in.
  • Core thickness: 1.0000 in.
  • Inlet diameter: 1.5000 in.
  • Outlet diameter: 1.5000 in.
  • Transmission oil cooler included: Yes

OE-Style Cooling Performance

Denso part number 221-3513 is engineered around OE radiator specifications, including core dimensions, tank design, fin pitch, and material selection. That attention to fitment and thermal performance helps maintain proper coolant flow and heat dissipation in the Mazda 6, while the integrated transmission oil cooler adds support for vehicles equipped with automatic transmission cooling through the radiator.

This part cross-references Spectra Premium CU13089 and CSF 3410 for the same application.

Common Problems This Radiator Can Address

  • Overheating caused by a leaking or restricted radiator
  • Coolant loss from cracked tanks or aged core materials
  • Reduced heat exchange from clogged internal passages
  • Transmission fluid temperature concerns when the radiator cooler circuit is failing
  • Poor cooling performance in a 2009-2010 Mazda 6 with a worn OE radiator

Installation Notes and Tips

Verify inlet and outlet hose sizes, mounting points, and transmission cooler line connections before installation. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant mixture after the radiator is installed. Confirm there are no air pockets in the system and check for leaks once the engine reaches operating temperature.

Quality Assurance

Denso supplies radiators to OE vehicle manufacturers worldwide, and its radiator designs are built to meet manufacturer standards for fit, function, and durability. Each unit is tested for performance and durability to support reliable cooling in the Mazda 6.

Related reading

This part fits 3 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionPositionNotes
2010Mazda6—N/A—
2009Mazda6—N/A—
2009Mazda6AutomaticN/A—
Directly replaces or cross-references 11 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
APDI — 8013089CSF — 3410DPI Performance Racing Products — 13088Mazda — CA07-15-200AMazda — L519-15-200BOSC — 13088Reach Cooling — 41-13089Spectra Premium — CU13089TYC Cooling - Archived — 13088TYC Cooling - Archived — 13089Vista Pro — 438451