Nissens 66780 Radiator

Nissens 66780 Aluminum Radiator

The Nissens 66780 radiator is an aluminum engine cooling replacement built for select Hyundai Sonata and Kia Optima applications. It is developed by Nissens, a manufacturer focused on thermal and engine efficiency components for the aftermarket.

• Aluminum construction for efficient heat transfer
• Core height: 19.5276
• Core width: 25.0394
• Core length: 0.6299
• Direct-fit radiator for engine cooling service
• Cross-reference: Bosch 13249

Fitment Details

Compatible with 2013 Hyundai Sonata, engine cooling optional. Compatible with 2011-2012 Hyundai Sonata, engine cooling. Compatible with 2011-2013 Kia Optima, engine cooling.

This part cross-references Bosch 13249 for the same application.

Product Overview

Built as a radiator for engine cooling systems, part number 66780 uses aluminum to support thermal transfer in the cooling circuit. The listed core dimensions help identify the correct replacement for vehicles that require this specific radiator size and configuration. For Hyundai Sonata and Kia Optima owners, Nissens 66780 provides a focused replacement option for restoring cooling-system function.

What It Helps Address

• Overheating caused by a leaking or restricted radiator
• Coolant loss from corrosion or damaged radiator passages
• Reduced cooling efficiency from a worn heat exchanger
• Temperature instability during normal engine operation
• Replacement needs after radiator damage or age-related wear

Installation Notes

Verify radiator dimensions, hose connections, and vehicle cooling-system configuration before installation. Confirm the application against the exact year, make, and model listed for your Hyundai Sonata or Kia Optima. After installation, refill and bleed the cooling system according to factory service procedures.

Quality Assurance

Nissens develops and manufactures thermal management components to consistent quality standards across its aftermarket range. Part number 66780 reflects that focus on engineered cooling-system replacement parts.