Nissens 77534 HVAC Heater Core

Nissens 77534 HVAC Heater Core

The Nissens 77534 HVAC heater core is built for direct-fit heating performance in select Kia and Hyundai applications. It uses an aluminum core and aluminum tanks with brazed cooling fins for efficient heat transfer and consistent cabin heat output.

Compatible with 2011-2016 Kia Optima, 2014-2016 Kia Cadenza, and 2011-2015 Hyundai Sonata, this heater core is a practical replacement for vehicles showing reduced heat or coolant-related HVAC concerns. The Nissens 77534 is engineered to match the thermal demands of these applications while supporting OE-style fitment.

Key Features

• HVAC heater core for cabin heating system service
• Aluminum core material for efficient thermal transfer
• Aluminum tank construction for corrosion-resistant design
• Brazed cooling fins for durable heat exchange performance
• Pipe included for application-specific installation needs
• Fits 2011-2016 Kia Optima, 2014-2016 Kia Cadenza, and 2011-2015 Hyundai Sonata

Detailed Description

Nissens part number 77534 is a heater core designed for vehicles that rely on a compact, efficient HVAC heat exchanger. The aluminum core and aluminum tank construction help support steady coolant-to-air heat transfer, while the brazed fin design adds structural integrity to the assembly. With dimensions of 6.3000 inches high, 9.0600 inches long, and 1.0600 inches wide, this unit is built around the packaging requirements of the listed Kia and Hyundai platforms. This part cross-references OE-style replacement number 971383S000 and OSC 98054 for the same application.

Common Issues This Part Can Address

• Weak or inconsistent cabin heat
• Coolant odor inside the vehicle from heater core leakage
• Fogging or film on the windshield caused by HVAC coolant seepage
• Restricted heater performance from a clogged or deteriorated core
• HVAC heating loss in Kia Optima, Kia Cadenza, or Hyundai Sonata applications

Installation Notes and Tips

Verify the vehicle’s year, make, and model against the listed fitment before installation. Inspect the HVAC housing, coolant hoses, and related seals during replacement, and flush the cooling system if contamination or debris is present. Confirm pipe routing and connection points match the original heater core layout for the specific application.

Quality Assurance

Nissens develops and manufactures thermal management components to consistent quality standards, and this heater core reflects that focus on OE-style replacement performance for the listed Kia and Hyundai vehicles.