Denso 221-9394 Radiator
OE Quality 60-Day Returns
Denso

Denso 221-9394 Radiator

Brand Denso 221-9394
Core Height 16.7300
Core Thickness 0.9800
Core Width 26.8500
Inlet Diameter 1.3750
Outlet Diameter 1.3600
Transmission Oil Cooler Included YES
Fits Cadillac · 4 vehicles

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

Durability tested. Passes strict function and durability checks.

Radiator performance. Helps maintain proper engine cooling and function.

Cross-references ACDelco 21512, ACDelco 19258627 and APDI 8012731 for the same application. See all 10.

$172.64Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $172.64
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Radiator options

Denso Radiator for 2004-2007 Cadillac CTS

This Denso radiator, part number 221-9394, is built for 2004-2007 Cadillac CTS applications that require OE-style cooling performance and direct fitment. It includes an integrated transmission oil cooler and is specified with core dimensions that match the vehicle’s cooling system requirements.

Key Features

  • Fits 2004-2007 Cadillac CTS, N/A
  • Part number 221-9394 for easy catalog lookup
  • Core height: 16.7300 in.
  • Core width: 26.8500 in.
  • Core thickness: 0.9800 in.
  • Inlet diameter: 1.3750 in.
  • Outlet diameter: 1.3600 in.
  • Transmission oil cooler included

Detailed Description

Denso supplies radiators to OE vehicle manufacturers and applies that OE engineering experience to this replacement radiator. The core configuration, tank design, fin pitch, dimensions, and materials are built to meet strict manufacturer standards, helping maintain stable engine temperature and consistent cooling-system operation. For Cadillac CTS owners searching for a radiator replacement, 221-9394 offers the fitment and specifications needed for a direct-service repair.

This radiator cross-references ACDelco 21512 and Spectra Premium CU2731 for the same application. If you are replacing a leaking or restricted radiator on a Cadillac CTS, this Denso 221-9394 unit provides the correct cooling-system layout for the listed model years.

What It Helps Fix

  • Coolant leaks from a damaged radiator core or tank
  • Overheating caused by reduced heat transfer
  • Transmission temperature issues related to radiator cooler failure
  • Restricted coolant flow from internal blockage or corrosion
  • Cooling-system service needs on 2004-2007 Cadillac CTS models

Installation Notes and Tips

Verify the inlet and outlet diameters, core dimensions, and transmission cooler connections before installation. Drain the cooling system fully, inspect hoses and clamps, and flush the system if contamination is present. After installation, refill with the correct coolant mixture and bleed air from the system according to the vehicle service procedure.

Quality Assurance

Denso radiators are built using OE-level design standards and are tested for durability and function before release. That focus on fitment and performance supports dependable cooling on the Cadillac CTS platform.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionPositionNotes
2007CadillacCTSAutomaticN/A—
2006CadillacCTSAutomaticN/A—
2005CadillacCTSAutomaticN/A—
2004CadillacCTS—N/A—
Directly replaces or cross-references 10 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 21512ACDelco — 19258627APDI — 8012731Cadillac — 88987622CSF — 3571DPI Performance Racing Products — 2731OSC — 2731Reach Cooling — 41-2731Spectra Premium — CU2731TYC Cooling - Archived — 2731