CSF 3701 Radiator

OE-Style Cooling for Toyota Highlander

The CSF 3701 radiator is an OE-style replacement built with a 1-row aluminum core and plastic tanks for the 2010-2013 Toyota Highlander. It is engineered for direct-fit cooling performance, with down-flow construction and integrated oil cooler provisions for the listed applications.

Key Features

• 1-row radiator design with aluminum core and plastic tanks
• Down-flow configuration for the specified Toyota Highlander applications
• Core thickness: 7/8 in.
• Core size: 30 5/16 in. wide x 18 11/16 in. long
• Inlet: 1 3/8 in. center; outlet: 1 3/8 in. right
• High-efficiency concentric-type oil cooler section: 14 3/4 in.
• OE-style plastic tank and aluminum core construction
• Part number: CSF 3701

Detailed Description

CSF 3701 is a radiator assembly for 2010-2013 Toyota Highlander models, including 2010 Toyota Highlander without towing package and 2011-2013 Toyota Highlander. CSF manufactures a wide range of radiator applications and validates cooling performance through lab testing, with production built to recognized quality standards. This radiator follows an OE-style layout with plastic tanks and an aluminum core to match the factory cooling system design.

This part cross-references BBB Industries 13122 and Carlson 13123 for the same application. The CSF 3701 part number is also referenced in interchange listings for related OE-style replacement use.

What It Helps Address

• Overheating caused by a leaking or restricted radiator
• Coolant loss from cracked plastic tanks or aged seams
• Reduced cooling efficiency in high-mileage Toyota Highlander cooling systems
• Transmission or engine temperature concerns tied to radiator wear
• Replacement needs after corrosion, impact damage, or internal blockage

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet locations, and oil cooler configuration before installation. This radiator does not include a cap. The listed fitment is for 2010-2013 Toyota Highlander applications, with the 2010 model specified without towing package. Confirm hose routing and mounting points against the original unit before final assembly.

Quality Assurance

CSF states that its factories are ISO/TSO certified and that its radiators are engineered for performance validation through laboratory testing. The brand has supplied radiators worldwide for decades and manufactures a broad catalog of OE-style cooling components.