Nissens 77643 HVAC Heater Core

Nissens 77643 HVAC Heater Core

The Nissens 77643 HVAC heater core is built for direct-fit replacement in select Hyundai applications, including the 2012-2013 Hyundai Accent and 2012 Hyundai Veloster. With an aluminum core and aluminum tanks, it is designed for efficient heat transfer and dependable cabin heating performance.

• Aluminum core material for thermal efficiency
• Aluminum tank construction for corrosion-resistant durability
• Brazed cooling fins for consistent heat exchange
• Pipe included for application-specific installation
• Direct replacement for Hyundai Accent and Hyundai Veloster heater core service

Fitment Details

Compatible with 2012-2013 Hyundai Accent, N/A. Compatible with 2012 Hyundai Veloster, N/A. This part number, 77643, also cross-references Hyundai OE part number 971381R000 for the same application.

Product Overview

Nissens 77643 is an HVAC heater core engineered for vehicles that rely on stable coolant-to-air heat transfer inside the climate control system. The aluminum core and aluminum tank design support efficient heating performance, while brazed cooling fins help maintain consistent airflow through the core. For buyers searching for a Hyundai Accent heater core or Hyundai Veloster heater core, part number 77643 provides a focused replacement option backed by Nissens thermal-component manufacturing expertise.

Common Problems This Part Can Address

• Weak or uneven cabin heat
• Coolant odor inside the vehicle interior
• Fogging caused by heater core leakage
• Reduced HVAC heating output
• Heater core replacement after internal corrosion or blockage

Installation Notes

Verify vehicle fitment by year and model before installation. Inspect the HVAC housing, coolant hoses, and related seals for wear or contamination during heater core service. Proper system bleeding and coolant refill procedures should be followed after installation to restore normal heater operation.

Quality Assurance

Nissens develops thermal management components to OE-level specifications for the aftermarket, with manufacturing focused on consistent material quality and fit. Part number 77643 reflects that approach for heater core replacement in supported Hyundai applications.