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NissensPart #: 73921

Nissens 73921 HVAC Heater Core

Name: Nissens 73921 HVAC Heater Core
Brand: Nissens
SKU: BKMH-73921
Price: 59.52 USD
Availability: InStock

179 vehicles fit this part

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OE Direct Replacement — Bolt-on fit, no modifications needed

Fitment: Volkswagen and Audi, Beetle, TT, TT Quattro, Golf, Jetta, and R32

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Not what you need? See all HVAC Heater Core options

Overview of Nissens HVAC Heater Core 73921

The Nissens HVAC Heater Core 73921 is designed for reliable heating performance in select Audi and Volkswagen models. Engineered with durable aluminum core material and plastic tanks, this heater core ensures efficient heat transfer and long-lasting operation for vehicles like the Audi TT and Volkswagen Golf.

Core material constructed from lightweight aluminum for effective heat dissipation
Plastic tank material to reduce corrosion and weight
Mechanically jointed cooling fins for enhanced durability
Core dimensions: 9.25 inches height, 6.18 inches length, 1.65 inches width
Pipe not included, compatible with original vehicle fittings

Detailed Product Description

The Nissens HVAC Heater Core 73921 features a robust aluminum core that provides efficient heat exchange within the vehicle’s heating system. The plastic tanks help resist corrosion and maintain structural integrity over time. Its mechanically jointed cooling fins improve thermal conductivity and durability, ensuring consistent cabin heating. With precise core dimensions of 9.25 inches in height, 6.18 inches in length, and 1.65 inches in width, this heater core is engineered to fit specific Audi and Volkswagen models including the Beetle, Golf, Jetta, R32, TT, and TT Quattro.

Compatible Vehicles and Applications

This heater core is compatible with the following makes and models:

Audi Beetle
Audi Golf
Audi Jetta
Audi R32
Audi TT and TT Quattro
Volkswagen Beetle
Volkswagen Golf
Volkswagen Jetta
Volkswagen R32
Volkswagen TT and TT Quattro

Common Issues Addressed by This Heater Core

Insufficient cabin heat due to clogged or leaking heater core
Coolant leaks inside the vehicle’s HVAC system
Overheating caused by inefficient heat exchange
Corrosion damage to original heater core components
Reduced airflow or heating performance in Audi TT and Volkswagen Golf models

Installation Notes and Tips

Ensure compatibility with vehicle make and model before installation
Flush the cooling system to remove debris before installing the new heater core
Check all hose connections and clamps for secure fitment
Use OEM or equivalent quality coolant to prevent corrosion
Professional installation is recommended for proper fit and function

Quality Assurance and Warranty

The Nissens HVAC Heater Core 73921 is manufactured to meet or exceed OEM specifications for fit, form, and function. Constructed with corrosion-resistant materials and mechanically jointed fins, it offers reliable performance in demanding automotive environments. While specific warranty details may vary, Nissens products typically include a limited warranty against defects in materials and workmanship. Consult product documentation or supplier for exact warranty terms.

This part fits 179 vehicles. Search below:

Year	Make	Model	Submodel	Liters	Cylinders	Fuel Type	Position	Notes
2010	Volkswagen	Beetle	Base	2.5L	L5	GAS	N/A
2009	Volkswagen	Beetle	Base	2.5L	L5	GAS	N/A
2008	Volkswagen	Beetle	S	2.5L	L5	GAS	N/A
2008	Volkswagen	Beetle	SE	2.5L	L5	GAS	N/A
2007	Volkswagen	Beetle	2.5	2.5L	L5	GAS	N/A
2006	Audi	TT	Base	1.8L	L4	GAS	N/A
2006	Audi	TT Quattro	Base	1.8L	L4	GAS	N/A
2006	Audi	TT Quattro	Base	3.2L	V6	GAS	N/A
2006	Audi	TT Quattro	Special Edition	3.2L	V6	GAS	N/A
2006	Volkswagen	Beetle	2.5	2.5L	L5	GAS	N/A
2006	Volkswagen	Beetle	TDI	1.9L	L4	DIESEL	N/A
2006	Volkswagen	Golf	GL	2.0L	L4	GAS	N/A
2006	Volkswagen	Golf	GTI 1.8T	1.8L	L4	GAS	N/A
2006	Volkswagen	Golf	GLS	2.0L	L4	GAS	N/A
2006	Volkswagen	Golf	GLS TDI	1.9L	L4	DIESEL	N/A
2005	Audi	TT	Base	1.8L	L4	GAS	N/A
2005	Audi	TT Quattro	Base	1.8L	L4	GAS	N/A
2005	Audi	TT Quattro	Base	3.2L	V6	GAS	N/A
2005	Volkswagen	Beetle	GLS TDI	1.9L	L4	DIESEL	N/A
2005	Volkswagen	Beetle	GL	2.0L	L4	GAS	N/A
2005	Volkswagen	Beetle	GLS	1.8L	L4	GAS	N/A
2005	Volkswagen	Beetle	GLS	2.0L	L4	GAS	N/A
2005	Volkswagen	Golf	GTI VR6	2.8L	V6	GAS	N/A
2005	Volkswagen	Golf	GTI 1.8T	1.8L	L4	GAS	N/A
2005	Volkswagen	Golf	GL	2.0L	L4	GAS	N/A
2005	Volkswagen	Golf	GLS	2.0L	L4	GAS	N/A
2005	Volkswagen	Golf	TDI	1.9L	L4	DIESEL	N/A
2005	Volkswagen	Jetta	GL	1.8L	L4	GAS	N/A	Wagon
2005	Volkswagen	Jetta	GLS	2.0L	L4	GAS	N/A	Wagon
2005	Volkswagen	Jetta	GLI	1.8L	L4	GAS	N/A	Sedan (To Chassis/VIN 9M-5-149 999)
2005	Volkswagen	Jetta	GL	2.0L	L4	GAS	N/A	Wagon
2005	Volkswagen	Jetta	GL	1.8L	L4	GAS	N/A	Sedan (To Chassis/VIN 9M-5-149 999)
2005	Volkswagen	Jetta	GLS TDI	1.9L	L4	DIESEL	N/A	Wagon
2005	Volkswagen	Jetta	GLS	2.0L	L4	GAS	N/A	Sedan (To Chassis/VIN 9M-5-149 999)
2005	Volkswagen	Jetta	GLS	1.8L	L4	GAS	N/A	Wagon
2005	Volkswagen	Jetta	2.5	2.5L	L5	GAS	N/A	To Chassis/VIN 9M-5-149 999
2005	Volkswagen	Jetta	GLS	1.8L	L4	GAS	N/A	Sedan (To Chassis/VIN 9M-5-149 999)
2005	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A	To Chassis/VIN 9M-5-149 999
2005	Volkswagen	Jetta	GL TDI	1.9L	L4	DIESEL	N/A	Wagon
2005	Volkswagen	Jetta	GLS TDI	1.9L	L4	DIESEL	N/A	Sedan (To Chassis/VIN 9M-5-149 999)
2005	Volkswagen	Jetta	GL	2.0L	L4	GAS	N/A	Sedan (To Chassis/VIN 9M-5-149 999)
2005	Volkswagen	Jetta	GLI	1.8L	L4	GAS	N/A	Wagon
2005	Volkswagen	Jetta	GL TDI	1.9L	L4	DIESEL	N/A	Sedan (To Chassis/VIN 9M-5-149 999)
2004	Audi	TT	Base	1.8L	L4	GAS	N/A
2004	Audi	TT Quattro	Base	3.2L	V6	GAS	N/A
2004	Audi	TT Quattro	Base	1.8L	L4	GAS	N/A
2004	Volkswagen	Beetle	GLS	2.0L	L4	GAS	N/A
2004	Volkswagen	Beetle	GLS	1.8L	L4	GAS	N/A
2004	Volkswagen	Beetle	GL	2.0L	L4	GAS	N/A
2004	Volkswagen	Beetle	GL	1.9L	L4	DIESEL	N/A
2004	Volkswagen	Beetle	GLX	1.8L	L4	GAS	N/A
2004	Volkswagen	Beetle	GLS	1.9L	L4	DIESEL	N/A
2004	Volkswagen	Beetle	Turbo S	1.8L	L4	GAS	N/A
2004	Volkswagen	Golf	GTI VR6	2.8L	V6	GAS	N/A
2004	Volkswagen	Golf	GL	2.0L	L4	GAS	N/A
2004	Volkswagen	Golf	GLS	2.0L	L4	GAS	N/A
2004	Volkswagen	Golf	GTI 1.8T	1.8L	L4	GAS	N/A
2004	Volkswagen	Golf	GL TDI	1.9L	L4	DIESEL	N/A
2004	Volkswagen	Golf	GLS TDI	1.9L	L4	DIESEL	N/A
2004	Volkswagen	Jetta	GLS	1.8L	L4	GAS	N/A
2004	Volkswagen	Jetta	GL	2.0L	L4	GAS	N/A
2004	Volkswagen	Jetta	GLS	2.0L	L4	GAS	N/A
2004	Volkswagen	Jetta	GLI	2.8L	V6	GAS	N/A
2004	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A
2004	Volkswagen	R32	Base	3.2L	V6	GAS	N/A
2003	Audi	TT	Base	1.8L	L4	GAS	N/A
2003	Audi	TT Quattro	Base	1.8L	L4	GAS	N/A
2003	Volkswagen	Beetle	GL	2.0L	L4	GAS	N/A
2003	Volkswagen	Beetle	GL	1.8L	L4	GAS	N/A
2003	Volkswagen	Beetle	GL	1.9L	L4	DIESEL	N/A
2003	Volkswagen	Beetle	GLX	1.8L	L4	GAS	N/A
2003	Volkswagen	Beetle	GLS	2.0L	L4	GAS	N/A
2003	Volkswagen	Beetle	GLS	1.9L	L4	DIESEL	N/A
2003	Volkswagen	Beetle	GLS	1.8L	L4	GAS	N/A
2003	Volkswagen	Beetle	Turbo S	1.8L	L4	GAS	N/A
2003	Volkswagen	Golf	GL	1.9L	L4	DIESEL	N/A
2003	Volkswagen	Golf	GL	2.0L	L4	GAS	N/A
2003	Volkswagen	Golf	GLS	2.0L	L4	GAS	N/A
2003	Volkswagen	Golf	GLS	1.9L	L4	DIESEL	N/A
2003	Volkswagen	Golf	GTI VR6	2.8L	V6	GAS	N/A
2003	Volkswagen	Golf	GTI 20th Anniversary	1.8L	L4	GAS	N/A
2003	Volkswagen	Golf	GTI 1.8T	1.8L	L4	GAS	N/A
2003	Volkswagen	Jetta	GL	1.8L	L4	GAS	N/A
2003	Volkswagen	Jetta	GL	2.0L	L4	GAS	N/A
2003	Volkswagen	Jetta	GLX	2.8L	V6	GAS	N/A
2003	Volkswagen	Jetta	GLS	2.0L	L4	GAS	N/A
2003	Volkswagen	Jetta	GLS	1.8L	L4	GAS	N/A
2003	Volkswagen	Jetta	GLI	2.8L	V6	GAS	N/A
2003	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A
2002	Audi	TT	Base	1.8L	L4	GAS	N/A
2002	Audi	TT Quattro	Base	1.8L	L4	GAS	N/A
2002	Audi	TT Quattro	ALMS Edition	1.8L	L4	GAS	N/A
2002	Volkswagen	Beetle	GL	1.8L	L4	GAS	N/A
2002	Volkswagen	Beetle	Sport	1.8L	L4	GAS	N/A
2002	Volkswagen	Beetle	GLS	1.9L	L4	DIESEL	N/A
2002	Volkswagen	Beetle	GL	2.0L	L4	GAS	N/A
2002	Volkswagen	Beetle	GL	1.9L	L4	DIESEL	N/A
2002	Volkswagen	Beetle	GLX	1.8L	L4	GAS	N/A
2002	Volkswagen	Beetle	GLS	2.0L	L4	GAS	N/A
2002	Volkswagen	Beetle	GLS	1.8L	L4	GAS	N/A
2002	Volkswagen	Beetle	Sport	2.0L	L4	GAS	N/A
2002	Volkswagen	Beetle	Sport	1.9L	L4	DIESEL	N/A
2002	Volkswagen	Beetle	Turbo S	1.8L	L4	GAS	N/A
2002	Volkswagen	Golf	GL	2.0L	L4	GAS	N/A
2002	Volkswagen	Golf	GL	1.9L	L4	DIESEL	N/A
2002	Volkswagen	Golf	GLS	2.0L	L4	GAS	N/A
2002	Volkswagen	Golf	GLS	1.9L	L4	DIESEL	N/A
2002	Volkswagen	Golf	GTI VR6	2.8L	V6	GAS	N/A
2002	Volkswagen	Golf	GTI 337	1.8L	L4	GAS	N/A
2002	Volkswagen	Golf	GTI 1.8T	1.8L	L4	GAS	N/A
2002	Volkswagen	Jetta	GLS	1.8L	L4	GAS	N/A
2002	Volkswagen	Jetta	GL	2.0L	L4	GAS	N/A
2002	Volkswagen	Jetta	GLX	2.8L	V6	GAS	N/A
2002	Volkswagen	Jetta	GLS	2.0L	L4	GAS	N/A
2002	Volkswagen	Jetta	GLS	2.8L	V6	GAS	N/A
2002	Volkswagen	Jetta	GLI	2.8L	V6	GAS	N/A
2002	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A
2001	Audi	TT	Base	1.8L	L4	GAS	N/A
2001	Audi	TT Quattro	Base	1.8L	L4	GAS	N/A
2001	Volkswagen	Beetle	Sport	2.0L	L4	GAS	N/A
2001	Volkswagen	Beetle	Sport	1.9L	L4	DIESEL	N/A
2001	Volkswagen	Beetle	GL	2.0L	L4	GAS	N/A
2001	Volkswagen	Beetle	GL	1.9L	L4	DIESEL	N/A
2001	Volkswagen	Beetle	GL	1.8L	L4	GAS	N/A
2001	Volkswagen	Beetle	GLX	1.8L	L4	GAS	N/A
2001	Volkswagen	Beetle	GLS	2.0L	L4	GAS	N/A
2001	Volkswagen	Beetle	GLS	1.9L	L4	DIESEL	N/A
2001	Volkswagen	Beetle	GLS	1.8L	L4	GAS	N/A
2001	Volkswagen	Beetle	Sport	1.8L	L4	GAS	N/A
2001	Volkswagen	Golf	GL	2.0L	L4	GAS	N/A
2001	Volkswagen	Golf	GL	1.9L	L4	DIESEL	N/A
2001	Volkswagen	Golf	GLS	2.0L	L4	GAS	N/A
2001	Volkswagen	Golf	GLS	1.9L	L4	DIESEL	N/A
2001	Volkswagen	Golf	GLS	1.8L	L4	GAS	N/A
2001	Volkswagen	Golf	GTI GLS	1.8L	L4	GAS	N/A
2001	Volkswagen	Golf	GTI GLX	2.8L	V6	GAS	N/A
2001	Volkswagen	Jetta	GLX	2.8L	V6	GAS	N/A
2001	Volkswagen	Jetta	GLS	2.0L	L4	GAS	N/A
2001	Volkswagen	Jetta	GL	2.0L	L4	GAS	N/A
2001	Volkswagen	Jetta	GLS	1.8L	L4	GAS	N/A
2001	Volkswagen	Jetta	GLS	2.8L	V6	GAS	N/A
2001	Volkswagen	Jetta	Wolfsburg Edition	1.8L	L4	GAS	N/A
2001	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A
2000	Audi	TT	Base	1.8L	L4	GAS	N/A
2000	Audi	TT Quattro	Base	1.8L	L4	GAS	N/A
2000	Volkswagen	Beetle	GL	1.9L	L4	DIESEL	N/A
2000	Volkswagen	Beetle	GL	1.8L	L4	GAS	N/A
2000	Volkswagen	Beetle	GLS	2.0L	L4	GAS	N/A
2000	Volkswagen	Beetle	GL	2.0L	L4	GAS	N/A
2000	Volkswagen	Beetle	GLX	1.8L	L4	GAS	N/A
2000	Volkswagen	Beetle	GLS	1.9L	L4	DIESEL	N/A
2000	Volkswagen	Beetle	GLS	1.8L	L4	GAS	N/A
2000	Volkswagen	Golf	GL	2.0L	L4	GAS	N/A
2000	Volkswagen	Golf	GTI GLS	1.8L	L4	GAS	N/A
2000	Volkswagen	Golf	GL	1.9L	L4	DIESEL	N/A
2000	Volkswagen	Golf	GLS	2.0L	L4	GAS	N/A
2000	Volkswagen	Golf	GLS	1.9L	L4	DIESEL	N/A
2000	Volkswagen	Golf	GLS	1.8L	L4	GAS	N/A
2000	Volkswagen	Golf	GTI GLS	2.0L	L4	GAS	N/A
2000	Volkswagen	Golf	GTI GLX	2.8L	V6	GAS	N/A
2000	Volkswagen	Jetta	GLS	2.0L	L4	GAS	N/A
2000	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A
2000	Volkswagen	Jetta	GLS	1.8L	L4	GAS	N/A
2000	Volkswagen	Jetta	GL	2.0L	L4	GAS	N/A
2000	Volkswagen	Jetta	GLX	2.8L	V6	GAS	N/A
2000	Volkswagen	Jetta	GLS	2.8L	V6	GAS	N/A
1999	Volkswagen	Beetle	GLX	1.8L	L4	GAS	N/A
1999	Volkswagen	Golf	GLS	2.0L	L4	GAS	N/A
1999	Volkswagen	Golf	TDI	1.9L	L4	DIESEL	N/A	From Chassis/VIN 1J-X-250 001
1999	Volkswagen	Golf	GL	2.0L	L4	GAS	N/A
1999	Volkswagen	Golf	GL	1.9L	L4	DIESEL	N/A	From Chassis/VIN 1J-X-250 001
1999	Volkswagen	Golf	Wolfsburg Edition	2.0L	L4	GAS	N/A
1999	Volkswagen	Golf	GTI	2.0L	L4	GAS	N/A
1999	Volkswagen	Golf	GTI	2.8L	V6	GAS	N/A
1999	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A
1998	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A
1997	Volkswagen	Jetta	TDI	1.9L	L4	DIESEL	N/A
1989	Volkswagen	Golf	GL	1.8L	L4	GAS	N/A
1988	Volkswagen	Golf	GL	1.8L	L4	GAS	N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1J18190311J1819031A1J1819031B1J2819031A1J2819031B81150181219581219693048937059473099039936

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.