Nissens 70224 HVAC Heater Core

Nissens 70224 HVAC Heater Core

The Nissens 70224 HVAC heater core is built for vehicles that need reliable cabin heat and stable thermal performance. It uses an aluminum core with plastic tanks and mechanically jointed cooling fins for a durable, service-focused design.

Compatible with select Audi and Volkswagen applications, including Audi A4, Audi A4 Quattro, Audi S4, Audi Cabriolet, Audi 90, Audi 90 Quattro, Audi 80, Audi 80 Quattro, Audi Coupe Quattro, and Volkswagen Passat. This Nissens heater core 70224 is a direct-fit replacement for common OE-style heating system service.

Key Features

• Aluminum core construction for efficient heat transfer
• Plastic tank material for a lightweight, OE-style design
• Mechanically jointed cooling fins for consistent core assembly
• Core dimensions: 9.2500 in. height, 6.1000 in. length, 1.6500 in. width
• Pipe not included
• Cross-references Dorman - HELP 93502 for the same application
• Part number 70224 for easy identification and ordering

Detailed Description

Nissens develops thermal management components with a focus on fit, function, and material quality. The 70224 heater core follows that approach with an aluminum heat-exchange core, plastic end tanks, and mechanically jointed cooling fins that support dependable cabin heating performance. It is a practical replacement for aging or leaking heater cores in Audi A4 and Volkswagen Passat platforms, as well as several related Audi models from the late 1980s through the early 2000s. If you are servicing an Audi A4 heater core or replacing a Volkswagen Passat heater core, part number 70224 provides a straightforward OE-style solution.

What It Helps Fix

• Weak or uneven cabin heat
• Coolant odor inside the vehicle
• Fogging or film on the inside of the windshield
• Coolant loss from a leaking heater core
• Restricted heat output caused by an aging core

Installation Notes and Tips

Verify vehicle fitment by year, make, and model before installation. This heater core does not include pipes, so reuse or source the required vehicle-specific connections as needed. Inspect the HVAC housing, coolant hoses, and clamps during service, and flush the cooling system if contamination or debris is present. Confirm the core dimensions match the original unit before reassembly.

Quality Assurance

Nissens is a market-leading manufacturer of thermal and engine efficiency components, and its products are developed and manufactured to consistent quality standards. The 70224 heater core reflects that manufacturing focus with materials and construction suited to aftermarket HVAC repair.

Fitment

• Fits 1998-2005 Volkswagen Passat, N/A
• Fits 2000-2002 Audi S4, N/A
• Fits 1996-2001 Audi A4, N/A
• Fits 1996-2001 Audi A4 Quattro, N/A
• Fits 1994-1998 Audi Cabriolet, N/A
• Fits 1993-1995 Audi 90, N/A
• Fits 1995 Audi 90 Quattro, N/A
• Fits 1993-1994 Audi 90 Quattro, N/A
• Fits 1988-1991 Audi 90 Quattro, N/A
• Fits 1988-1992 Audi 80, N/A
• Fits 1988-1992 Audi 80 Quattro, N/A
• Fits 1988-1991 Audi 90, N/A
• Fits 1990-1991 Audi Coupe Quattro, N/A