Denso 221-3170 Radiator
OE Quality 60-Day Returns
Denso

Denso 221-3170 Radiator

Brand Denso 221-3170
Core Height 16.7500
Core Thickness 0.6250
Core Width 29.8120
Inlet Diameter 1.5000
Outlet Diameter 1.5000
Transmission Oil Cooler Included YES
Fits Lexus · 6 vehicles

OE experience. Built to meet rigid OE standards for fit and performance.

Transmission oil cooler included. Integrated cooling support in one radiator assembly.

Engine cooling function. Helps maintain proper cooling under demanding conditions.

Cross-references APDI 8012418, CSF 2806 and DPI Performance Racing Products 2418 for the same application. See all 9.

$172.42Free shipping
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Order total $172.42
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Free returns within 60 days if it doesn't fit when fitment is verified.
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Denso Radiator for Lexus LS430

This Denso radiator is built for 2001-2006 Lexus LS430 models without Tow Package. Part number 221-3170 is engineered to match OE-style dimensions and cooling requirements for a direct-fit replacement in the LS430 cooling system.

  • Core height: 16.7500
  • Core width: 29.8120
  • Core thickness: 0.6250
  • Inlet diameter: 1.5000
  • Outlet diameter: 1.5000
  • Transmission oil cooler included
  • OE-focused radiator construction for fitment and cooling performance

OE-Style Cooling Performance

Denso supplies radiators to original equipment vehicle manufacturers, and this radiator reflects that OE engineering approach. The core dimensions, tank design, fin pitch, and materials are built to meet strict manufacturing standards, helping maintain proper engine temperature and transmission fluid cooling in the Lexus LS430. If you are replacing a worn or leaking radiator on a 2001-2006 Lexus LS430, part number 221-3170 provides a direct replacement solution with the correct inlet and outlet sizing.

This part cross-references Lexus 16400-50231 for the same application.

Common Problems This Radiator Can Address

  • Coolant leaks from a cracked or aging radiator
  • Overheating caused by reduced cooling efficiency
  • Transmission temperature concerns related to radiator cooler failure
  • Restricted coolant flow from internal corrosion or buildup
  • Fitment issues from an incorrect replacement radiator

Installation Notes and Tips

Compatible with 2001-2006 Lexus LS430, without Tow Package. Verify hose connection size, mounting points, and transmission cooler line routing before installation. Flush the cooling system, inspect hoses and clamps, and confirm the cooling fan and thermostat are operating correctly when replacing the radiator. Part number 221-3170 should be matched to the vehicle’s exact configuration before installation.

Quality Assurance

Denso radiators are produced with OE supplier experience and undergo durability and function testing to support reliable cooling performance under demanding driving conditions. Part number 221-3170 is built to meet the fitment and performance expectations associated with OE replacement cooling components.

Related reading

This part fits 6 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2006LexusLS430N/AFits models without Tow Package.
2005LexusLS430N/AFits models without Tow Package.
2004LexusLS430N/AFits models without Tow Package.
2003LexusLS430N/AFits models without Tow Package.
2002LexusLS430N/AFits models without Tow Package.
2001LexusLS430N/AFits models without Tow Package.
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
APDI — 8012418CSF — 2806DPI Performance Racing Products — 2418Lexus — 16400-50231OSC — 2418Reach Cooling — 41-2419Spectra Premium — CU2419TYC Cooling - Archived — 2418Vista Pro — 432454