Nissens 73700 HVAC Heater Core

Nissens 73700 HVAC Heater Core

The Nissens 73700 HVAC heater core is built with aluminum core and tank construction and brazed cooling fins for efficient heat transfer in the cabin heating system. It is a direct-fit replacement for select Infiniti G20 and Nissan Altima applications, with fitment coverage for 1998-2002 model years.

Key Features

• Aluminum core material for lightweight thermal performance
• Aluminum tank material for corrosion-resistant construction
• Brazed cooling fins for consistent heat exchange
• Core dimensions: 5.9100 in. height, 7.4800 in. length, 0.9800 in. width
• Pipe included: No
• Cross-references Spectra Premium 93002 for the same application

Product Details

Nissens part number 73700 is an HVAC heater core engineered for vehicles that rely on compact, efficient cabin heat exchange. The aluminum core and aluminum tank design supports thermal transfer while keeping the assembly lightweight, and the brazed fin construction helps maintain airflow through the heater core surface. This part is listed for 1999-2002 Infiniti G20 and 1998-1999 Nissan Altima applications, making it a focused replacement choice for owners searching for a heater core for Infiniti G20 or Nissan Altima heating repair. The part number 73700 is also cross-referenced to 271401N700 and 271401N710.

Common Problems This Part Can Address

• Weak or uneven cabin heat
• Coolant odor inside the vehicle
• Fogging caused by heater core leakage
• Restricted heat output from a clogged core
• Cooling system leaks at the heater core assembly

Installation Notes and Tips

Verify vehicle year and model before ordering, since this heater core is listed for specific Infiniti G20 and Nissan Altima applications only. Compare the core dimensions and pipe configuration to the original unit, as pipes are not included with this part. Proper cooling system draining, flushing, and refill procedures should be followed during replacement to help protect the new heater core and restore normal heater performance.

Quality Assurance

Nissens develops thermal management components for the aftermarket with a focus on consistent manufacturing standards and application-specific fitment. Part number 73700 reflects that approach with aluminum construction and brazed cooling fins for dependable heater core service in the listed vehicles.