Denso 221-3148 Radiator

Denso Radiator for Toyota Highlander

The Denso 221-3148 radiator is built for direct-fit cooling system service on select Toyota Highlander applications. It combines OE-style dimensions with an integrated transmission oil cooler to support stable engine temperature control and transmission fluid cooling in one unit.

For 2009-2010 Toyota Highlander models without the tow package, and 2011 Toyota Highlander models without the tow package for Japan-built vehicles, this radiator is a focused replacement choice. The Denso 221-3148 is engineered around OE specifications for fitment, core sizing, and connection points.

Key Features

• OE-style radiator replacement from Denso
• Core height: 18.6870 in.
• Core width: 30.1870 in.
• Core thickness: 0.6250 in.
• Inlet diameter: 0.9370 in.
• Outlet diameter: 0.9370 in.
• Transmission oil cooler included
• Built to OE manufacturer standards for configuration and fitment

Detailed Description

Denso 221-3148 is a radiator assembly for Toyota Highlander cooling system repair where OE-style fit and thermal performance matter. Denso supplies radiators to vehicle manufacturers worldwide, and this unit reflects that OE experience through its core dimensions, tank design, fin pitch, and material selection. The result is a radiator intended to match the original cooling layout on the listed Highlander applications while supporting engine temperature regulation and transmission heat management.

This part cross-references Toyota 16041-36050 for the same application.

What This Radiator Helps Address

• Overheating caused by a leaking or restricted radiator
• Coolant loss from cracked tanks or damaged core passages
• Poor heat transfer from an aging radiator core
• Transmission fluid temperature concerns when the cooler circuit is part of the radiator
• Fitment issues from using the wrong radiator for a Toyota Highlander

Installation Notes and Tips

Verify the vehicle is a 2009-2010 Toyota Highlander without the tow package, or a 2011 Toyota Highlander without the tow package for Japan-built vehicles, before ordering. Confirm inlet and outlet hose sizes, cooler line routing, and mounting points against the original radiator before installation. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant mixture after installation.

Quality Assurance

Denso radiators are manufactured to OE-level standards and undergo durability and function testing before release. The 221-3148 is built to deliver reliable cooling performance and consistent fitment for the specified Toyota Highlander applications.