Nissens 646923 Radiator

Nissens 646923 Radiator for Toyota Highlander

The Nissens 646923 radiator is an aluminum cooling-system replacement built for select Toyota Highlander applications. It is engineered to support stable engine temperature control with a core sized for the listed fitments, including 2014-2016 Toyota Highlander models with the towing package and 2017-2019 Toyota Highlander models.

• Aluminum construction for efficient heat transfer
• Core height: 29.8031
• Core width: 20.6693
• Core length: 0.6299
• Direct-fit radiator replacement for listed Toyota Highlander applications
• Part number: 646923

Detailed Product Overview

Nissens develops thermal-management components with a focus on OE-style fit and consistent cooling performance. The 646923 radiator is part of that approach, using an aluminum core design to help dissipate heat from engine coolant as it circulates through the cooling system. For Toyota Highlander owners, this radiator is a practical replacement when the original unit shows signs of age, leakage, or reduced cooling efficiency. This part number, 646923, also cross-references Spectra Premium CU13449 for the same application.

Vehicle Fitment

• Fits 2017-2019 Toyota Highlander, N/A
• Fits 2014-2016 Toyota Highlander, N/A, Towing Package

What This Radiator Helps Address

• Coolant leaks from a damaged or corroded radiator core
• Engine temperature rise caused by restricted heat exchange
• Cooling-system wear in higher-load driving conditions
• Replacement needs after impact damage to the front cooling stack
• Reduced radiator efficiency in aging Toyota Highlander cooling systems

Installation Notes and Tips

Verify radiator dimensions and vehicle configuration before installation, especially on 2014-2016 Toyota Highlander models with the towing package. Inspect hoses, clamps, and coolant condition during replacement, and flush the system if contamination or debris is present. Confirm all connections are secure and check for leaks after refill and warm-up.

Quality Assurance

Nissens is a market-leading manufacturer of thermal and engine-efficiency components, and its products are developed and manufactured to a consistent quality standard across the range. The 646923 radiator reflects that manufacturing focus for Toyota Highlander cooling-system service.