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Denso 221-9478 Radiator

Brand	Denso 221-9478
Core Height	12.8125
Core Thickness	1.8750
Core Width	7.3750
Transmission Oil Cooler Included	No
Inlet Diameter	0.6875
Outlet Diameter	0.6875
Fits	Honda · 3 vehicles

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

Engine cooling essential. Helps maintain proper cooling and dependable engine function.

Durability tested. Passed rigorous function and durability checks for demanding conditions.

Cross-references APDI 13439, APDI 8013439 and DPI Performance Racing Products 13439 for the same application. See all 8.

$150.94Free shipping

In stock · usually ships same day before 1pm CST

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Denso 221-9478 Radiator for Honda Accord

The Denso 221-9478 radiator is an OE-style cooling component built for specific Honda Accord inverter cooling applications. It uses OE-matched core dimensions, inlet and outlet sizing, and material specifications to support proper thermal management and fitment.

Key Features

Core height: 12.8125 in.
Core width: 7.3750 in.
Core thickness: 1.8750 in.
Inlet diameter: 0.6875 in.
Outlet diameter: 0.6875 in.
No transmission oil cooler included
Built to Denso OE configuration standards for radiator fitment and function

Detailed Description

Denso 221-9478 is a radiator engineered for inverter cooling on select Honda Accord models. Denso supplies radiators to OE vehicle manufacturers worldwide, and this part reflects that OE-focused experience through its core dimensions, tank configuration, fin pitch, and materials. The result is a radiator intended to maintain stable cooling performance while matching the original application requirements for the Honda Accord.

This part cross-references Honda 1J010-5K0-004 and 1J010-5K0-014 for the same application. It also aligns with aftermarket references such as APDI 13439 and Spectra Premium CU13439.

Vehicle Fitment

Fits 2017 Honda Accord, N/A, Inverter Cooling
Fits 2014-2015 Honda Accord, N/A, Inverter Cooling

What This Radiator Helps Address

Overheating caused by a failing inverter cooling radiator
Coolant leaks from a damaged or corroded radiator core
Restricted coolant flow from internal blockage or deterioration
Poor heat transfer that can affect engine and inverter cooling performance
Fitment issues from using a radiator with incorrect dimensions or hose sizes

Installation Notes and Tips

Verify the core height, width, thickness, and hose diameters against the original unit before installation. Confirm the vehicle is one of the listed Honda Accord inverter cooling applications, and inspect hoses, clamps, and coolant condition during replacement. Proper system bleeding and refill procedures should be followed after installation to help restore normal cooling operation.

Quality Assurance

Denso radiators are built to OE standards and undergo durability and function testing before release. That manufacturing approach supports consistent fitment and dependable cooling performance for the listed Honda Accord applications.

This part fits 3 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Notes
2017	Honda	Accord	Inverter Cooling
2015	Honda	Accord	Inverter Cooling
2014	Honda	Accord	Inverter Cooling
No rows match your filter.

Directly replaces or cross-references 8 part numbers

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

APDI — 13439APDI — 8013439DPI Performance Racing Products — 13439Honda — 1J010-5K0-004Honda — 1J010-5K0-014OSC — 13439Reach Cooling — 41-13439Spectra Premium — CU13439