Nissens 73975 HVAC Heater Core - Front

Nissens 73975 HVAC Heater Core for Front Fitment

The Nissens 73975 HVAC heater core is built for front-position applications on select Audi, Porsche, and Volkswagen models. It uses an aluminum core and aluminum tanks with brazed cooling fins to support efficient heat transfer and consistent cabin heat output.

Key Features

• Aluminum core material for thermal efficiency and corrosion resistance
• Aluminum tank construction for a lightweight, durable assembly
• Brazed cooling fins for effective heat exchange
• Pipe included for direct replacement applications
• Fits front HVAC heater core locations on select Audi Q7, Porsche Cayenne, and Volkswagen Touareg models
• Part number 73975 for accurate ordering and catalog matching

Detailed Description

Nissens 73975 is an HVAC heater core engineered for front-mounted applications in 2003-2015 Audi Q7, Porsche Cayenne, and Volkswagen Touareg fitments. The aluminum core and aluminum tank design helps maintain efficient coolant-to-air heat transfer, while brazed cooling fins support stable performance in the heating system. This part number 73975 is a direct-fit style replacement for vehicles that use the listed OE cross-references and front-position heater core configuration.

Nissens develops thermal management components for aftermarket use with a focus on manufacturing consistency and application coverage. This heater core is suited for drivers and repair shops replacing a leaking, restricted, or heat-loss-prone unit in the cabin heating circuit.

This part cross-references OSC 98044 for the same application.

What It Is Used For

• Restoring weak or uneven cabin heat
• Replacing a heater core with coolant seepage or leakage
• Addressing restricted coolant flow through the HVAC heating circuit
• Correcting fogging or sweet coolant odor caused by heater core failure
• Repairing front HVAC heating performance on Audi Q7, Porsche Cayenne, and Volkswagen Touareg models

Installation Notes and Tips

Verify the vehicle’s front heater core configuration and compare the OE number before installation. Confirm the pipe connection style and dimensions against the removed unit, especially on 2003-2006 and 2007-2015 applications. Flush the cooling system as needed and inspect hoses, clamps, and seals for wear before reassembly.

Quality Assurance

Nissens manufactures thermal and engine-efficiency components to controlled quality standards, and this heater core is part of its aftermarket range for application-specific replacement.