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NissensPart #: 70226

Nissens 70226 HVAC Heater Core

Name: Nissens 70226 HVAC Heater Core
Brand: Nissens
SKU: BKMH-70226
Price: 80.88 USD
Availability: InStock

85 vehicles fit this part

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

Fitment: Audi, A4, A4 Quattro, RS4, and S4

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Nissens 70226 HVAC Heater Core for Audi A4

The Nissens 70226 HVAC heater core is built for Audi A4, Audi A4 Quattro, Audi S4, and Audi RS4 applications from 2002-2009. It uses an aluminum core and aluminum tanks with brazed cooling fins for efficient heat transfer and consistent cabin heat output.

Key Features

Aluminum core material for lightweight thermal performance
Aluminum tank construction for corrosion-resistant durability
Brazed cooling fins for stable heat exchange
Core dimensions: 9.3700 in. height, 5.7100 in. length, 1.5700 in. width
No pipe included
Fits 2002-2009 Audi A4, 2002-2009 Audi A4 Quattro, 2004-2009 Audi S4, and 2007-2008 Audi RS4

Detailed Description

This Nissens heater core, part number 70226, is an HVAC heater core engineered for vehicles that rely on efficient coolant-to-air heat transfer inside the cabin. The aluminum core and tank design, combined with brazed cooling fins, supports steady thermal performance in the heating system. Nissens develops thermal management components with a focus on consistent manufacturing quality across its aftermarket range. This part cross-references Dorman - HELP 99373 for the same application.

Common Heater Core Issues It May Address

Weak or uneven cabin heat
Coolant odor inside the vehicle
Fogging or film on interior glass from heater core leakage
Restricted heat flow caused by an aging or clogged heater core
Loss of heater performance in Audi A4, Audi A4 Quattro, Audi S4, or Audi RS4 models

Installation Notes and Tips

Verify vehicle fitment by year and model before installation. Inspect the HVAC system, coolant hoses, and seals for wear or contamination during replacement. Because no pipe is included, confirm the existing connection setup matches the replacement part before beginning the job. Proper coolant refill and system bleeding are important after installation to restore heater performance.

Quality Assurance

Nissens manufactures thermal and engine efficiency components to consistent quality standards and continues to develop aftermarket solutions as vehicle technology changes. Part number 70226 is built to support dependable HVAC service in the listed Audi applications.

Brand	Nissens
Part Number	70226
Core Material	Aluminum
Tank Material	Aluminum
Construction	Brazed cooling fins
Core Height	9.3700
Core Length	5.7100
Core Width	1.5700
Pipe Included	No

This part fits 85 vehicles. Search below:

Year	Make	Model	Submodel	Liters	Cylinders	Fuel Type	Position
2009	Audi	A4	Cabriolet	2.0L	L4	GAS	N/A
2009	Audi	A4 Quattro	Cabriolet	3.2L	V6	GAS	N/A
2009	Audi	A4 Quattro	Cabriolet	2.0L	L4	GAS	N/A
2009	Audi	S4	Cabriolet	4.2L	V8	GAS	N/A
2008	Audi	A4	Base	3.2L	V6	GAS	N/A
2008	Audi	A4	Base	2.0L	L4	GAS	N/A
2008	Audi	A4	Cabriolet	2.0L	L4	GAS	N/A
2008	Audi	A4 Quattro	Cabriolet	2.0L	L4	GAS	N/A
2008	Audi	A4 Quattro	Avant	3.2L	V6	GAS	N/A
2008	Audi	A4 Quattro	Avant	2.0L	L4	GAS	N/A
2008	Audi	A4 Quattro	Cabriolet	3.2L	V6	GAS	N/A
2008	Audi	A4 Quattro	Base	3.2L	V6	GAS	N/A
2008	Audi	A4 Quattro	Base	2.0L	L4	GAS	N/A
2008	Audi	RS4	Cabriolet	4.2L	V8	GAS	N/A
2008	Audi	RS4	Base	4.2L	V8	GAS	N/A
2008	Audi	S4	Avant	4.2L	V8	GAS	N/A
2008	Audi	S4	Cabriolet	4.2L	V8	GAS	N/A
2008	Audi	S4	Base	4.2L	V8	GAS	N/A
2007	Audi	A4	Cabriolet	2.0L	L4	GAS	N/A
2007	Audi	A4	Base	3.2L	V6	GAS	N/A
2007	Audi	A4	Base	2.0L	L4	GAS	N/A
2007	Audi	A4 Quattro	Avant	2.0L	L4	GAS	N/A
2007	Audi	A4 Quattro	Cabriolet	3.2L	V6	GAS	N/A
2007	Audi	A4 Quattro	Cabriolet	2.0L	L4	GAS	N/A
2007	Audi	A4 Quattro	Avant	3.2L	V6	GAS	N/A
2007	Audi	A4 Quattro	Base	2.0L	L4	GAS	N/A
2007	Audi	A4 Quattro	Base	3.2L	V6	GAS	N/A
2007	Audi	RS4	Base	4.2L	V8	GAS	N/A
2007	Audi	S4	Cabriolet	4.2L	V8	GAS	N/A
2007	Audi	S4	Avant	4.2L	V8	GAS	N/A
2007	Audi	S4	Base	4.2L	V8	GAS	N/A
2006	Audi	A4	Base	2.0L	L4	GAS	N/A
2006	Audi	A4	Cabriolet	1.8L	L4	GAS	N/A
2006	Audi	A4	Base	3.2L	V6	GAS	N/A
2006	Audi	A4 Quattro	Avant	2.0L	L4	GAS	N/A
2006	Audi	A4 Quattro	Avant	3.2L	V6	GAS	N/A
2006	Audi	A4 Quattro	Cabriolet	3.0L	V6	GAS	N/A
2006	Audi	A4 Quattro	Base	3.2L	V6	GAS	N/A
2006	Audi	A4 Quattro	Base	2.0L	L4	GAS	N/A
2006	Audi	S4	Cabriolet	4.2L	V8	GAS	N/A
2006	Audi	S4	Avant	4.2L	V8	GAS	N/A
2006	Audi	S4	Base	4.2L	V8	GAS	N/A
2005	Audi	A4	Cabriolet	3.0L	V6	GAS	N/A
2005	Audi	A4	Base	3.0L	V6	GAS	N/A
2005	Audi	A4	Base	2.0L	L4	GAS	N/A
2005	Audi	A4	Base	1.8L	L4	GAS	N/A
2005	Audi	A4	Cabriolet	1.8L	L4	GAS	N/A
2005	Audi	A4 Quattro	Avant	3.2L	V6	GAS	N/A
2005	Audi	A4 Quattro	Cabriolet	3.0L	V6	GAS	N/A
2005	Audi	A4 Quattro	Base	3.2L	V6	GAS	N/A
2005	Audi	A4 Quattro	Base	1.8L	L4	GAS	N/A
2005	Audi	A4 Quattro	Avant	3.0L	V6	GAS	N/A
2005	Audi	A4 Quattro	Avant	1.8L	L4	GAS	N/A
2005	Audi	A4 Quattro	Base	3.0L	V6	GAS	N/A
2005	Audi	A4 Quattro	Base	2.0L	L4	GAS	N/A
2005	Audi	A4 Quattro	Avant	2.0L	L4	GAS	N/A
2005	Audi	S4	Avant	4.2L	V8	GAS	N/A
2005	Audi	S4	Cabriolet	4.2L	V8	GAS	N/A
2005	Audi	S4	Base	4.2L	V8	GAS	N/A
2004	Audi	A4	Cabriolet	1.8L	L4	GAS	N/A
2004	Audi	A4	Cabriolet	3.0L	V6	GAS	N/A
2004	Audi	A4	Base	3.0L	V6	GAS	N/A
2004	Audi	A4	Base	1.8L	L4	GAS	N/A
2004	Audi	A4 Quattro	Avant	3.0L	V6	GAS	N/A
2004	Audi	A4 Quattro	Base	3.0L	V6	GAS	N/A
2004	Audi	A4 Quattro	Avant	1.8L	L4	GAS	N/A
2004	Audi	A4 Quattro	Cabriolet	3.0L	V6	GAS	N/A
2004	Audi	A4 Quattro	Base	1.8L	L4	GAS	N/A
2004	Audi	S4	Avant	4.2L	V8	GAS	N/A
2004	Audi	S4	Cabriolet	4.2L	V8	GAS	N/A
2004	Audi	S4	Base	4.2L	V8	GAS	N/A
2003	Audi	A4	Cabriolet	1.8L	L4	GAS	N/A
2003	Audi	A4	Cabriolet	3.0L	V6	GAS	N/A
2003	Audi	A4	Base	3.0L	V6	GAS	N/A
2003	Audi	A4	Base	1.8L	L4	GAS	N/A
2003	Audi	A4 Quattro	Avant	3.0L	V6	GAS	N/A
2003	Audi	A4 Quattro	Avant	1.8L	L4	GAS	N/A
2003	Audi	A4 Quattro	Base	3.0L	V6	GAS	N/A
2003	Audi	A4 Quattro	Base	1.8L	L4	GAS	N/A
2002	Audi	A4	Base	3.0L	V6	GAS	N/A
2002	Audi	A4	Base	1.8L	L4	GAS	N/A
2002	Audi	A4 Quattro	Base	3.0L	V6	GAS	N/A
2002	Audi	A4 Quattro	Base	1.8L	L4	GAS	N/A
2002	Audi	A4 Quattro	Avant	3.0L	V6	GAS	N/A
2002	Audi	A4 Quattro	Avant	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:

8122558E18200319388299373

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