Nissens 73979 HVAC Heater Core

Nissens 73979 Heater Core for Volkswagen HVAC Repair

The Nissens 73979 HVAC heater core is built for Volkswagen heating system service where reliable cabin heat and stable coolant-to-air transfer matter. It uses an aluminum core and aluminum tanks with brazed cooling fins for a durable, OE-style thermal design.

Compatible with select Volkswagen Tiguan, Tiguan Limited, Eos, CC, Golf, Golf R, GTI, and Passat applications, this heater core is a direct-fit solution for common HVAC repair work. The Nissens 73979 is engineered for vehicles originally equipped with Denso HVAC components.

Key Features

• Aluminum core material for efficient heat transfer
• Aluminum tank construction for consistent thermal performance
• Brazed cooling fins for a secure, service-ready design
• Pipe included for application-specific installation needs
• OE-style fitment for Volkswagen HVAC heater core replacement
• Cross-reference part numbers include 3C0819031 and 98030

Detailed Description

Nissens 73979 is a heater core for Volkswagen HVAC systems that require a compact aluminum heat exchanger with brazed cooling fins. The core measures 6.0200 in. high, 7.2800 in. long, and 1.0200 in. wide, supporting a precise fit within the heater box. This part number is used across multiple Volkswagen platforms, including Volkswagen Tiguan heater core replacement, Volkswagen Eos heater core service, and Volkswagen Passat HVAC repair. It also cross-references OSC 98030 for the same application.

As part of Nissens Automotive’s thermal component range, this heater core reflects the brand’s focus on aftermarket heating and cooling parts developed to meet demanding vehicle service requirements.

Common Problems This Part Helps Address

• Weak or uneven cabin heat
• Coolant odor inside the vehicle
• Interior fogging caused by heater core leakage
• Restricted coolant flow through the HVAC core
• Heating performance loss in Volkswagen Tiguan, Golf, GTI, and Passat models

Installation Notes and Tips

Verify HVAC system configuration before ordering, especially on vehicles noted with Denso equipment. Confirm the heater core dimensions and pipe layout against the removed part before installation. Proper cooling system draining, flushing, and air bleeding are important after heater core replacement to restore normal heater operation.

Quality Assurance

Nissens develops and manufactures thermal management components to consistent quality standards for aftermarket service. The 73979 heater core is built with aluminum construction and brazed fins to support dependable HVAC repair on covered Volkswagen applications.

Vehicle Fitment

• Fits 2017-2018 Volkswagen Tiguan Limited, N/A, vendor Denso.
• Fits 2012-2017 Volkswagen Tiguan, N/A, vendor Denso.
• Fits 2014-2016 Volkswagen Eos, N/A, vendor Denso.
• Fits 2009-2012 Volkswagen Eos, N/A, vendor Denso.
• Fits 2015 Volkswagen CC, N/A, to 01/11/2015.
• Fits 2009-2014 Volkswagen CC, N/A.
• Fits 2010-2014 Volkswagen Golf, N/A, vendor Denso.
• Fits 2010-2014 Volkswagen GTI, N/A, vendor Denso.
• Fits 2013 Volkswagen Eos, N/A.
• Fits 2012-2013 Volkswagen Golf R, N/A, vendor Denso.
• Fits 2009-2011 Volkswagen Tiguan, N/A.
• Fits 2006-2010 Volkswagen Passat, N/A.