Denso 221-3143 Radiator

Denso Radiator for Toyota Prius and Lexus CT200h

Denso radiator Part Number 221-3143 is an OE-style engine cooling replacement built for select Toyota Prius, Prius Plug-In, and Lexus CT200h applications. It is engineered around OE dimensions and materials to support consistent cooling performance, proper fitment, and dependable operation in daily driving.

Key Features

• Core height: 23.5620 in. for the specified cooling package
• Core width: 14.7500 in. for OE-style fitment
• Core thickness: 0.6250 in. to match the original radiator profile
• Inlet diameter: 1.4370 in.
• Outlet diameter: 1.4370 in.
• No transmission oil cooler included
• Built to Denso OE standards for configuration, fin pitch, tank design, and core dimensions

Detailed Description

Denso 221-3143 is a radiator replacement for 2010-2015 Toyota Prius gas engine cooling systems, 2012-2015 Toyota Prius Plug-In engine cooling, and 2015-2016 Lexus CT200h engine cooling. Denso applies OE supplier experience to the radiator design, using dimensions and materials that align with manufacturer requirements for fit and thermal performance. This makes it a direct choice for drivers looking for a radiator replacement for Toyota Prius cooling system service or Lexus CT200h engine cooling repair.

This part cross-references Toyota 16400-37230 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a damaged or corroded radiator core
• Overheating caused by restricted coolant flow or reduced heat transfer
• Cracked inlet or outlet connections
• Poor cooling performance after radiator aging or impact damage
• Replacement needs after a failed Toyota Prius or Lexus CT200h radiator

Installation Notes and Tips

Verify inlet and outlet hose sizes, core dimensions, and vehicle application before installation. This radiator does not include a transmission oil cooler, so confirm your original unit matches that configuration. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant specification after installation.

Quality Assurance

Denso supplies radiators to OE vehicle manufacturers worldwide, and its radiators are built to meet rigid manufacturer standards for configuration, durability, and function. Each unit is tested for durability and performance before release.