Four Seasons 90769 HVAC Heater Core

Four Seasons 90769 Heater Core

Four Seasons 90769 is an aluminum HVAC heater core built for direct replacement service in select Nissan and INFINITI applications. It is engineered and tested for dependable heat transfer and consistent operation in the cabin heating system.

Key Features

• Aluminum heater core construction
• Core dimensions: 6.375 in. height, 6.125 in. width, 1.875 in. depth
• Tube size: 0.625 in. (15.88 mm) inlet and outlet
• HVAC heater core for cabin heat restoration
• Four Seasons heater core line backed by more than 50 years of mobile A/C experience

Product Details

The Four Seasons heater core line focuses on replacement HVAC components that are engineered and tested for long service life. Part number 90769 uses an aluminum design and compact core sizing to match the original heater core layout in supported vehicles. This part cross-references Dorman - HELP 90699 for the same application.

Compatible With 1995-1997 Nissan Pickup, N/A; 1987-1995 Nissan Pathfinder, N/A; 1986-1994 Nissan D21, N/A; and 1990-1992 INFINITI M30, N/A. Search terms such as Nissan Pickup heater core replacement, Nissan Pathfinder aluminum heater core, and INFINITI M30 HVAC heater core point to this application range. Four Seasons 90769 is also a relevant search match for Nissan D21 heater core replacement.

Common Issues This Part Addresses

• Weak or uneven cabin heat
• Coolant leakage from the heater core area
• Restricted coolant flow through the HVAC core
• Fogging or sweet odor caused by heater core seepage
• Loss of heater performance in supported Nissan and INFINITI models

Installation Notes and Tips

Verify the core dimensions and tube size against the original unit before installation. Inspect heater hoses, clamps, and coolant condition during replacement so the new heater core is installed into a clean, leak-free system. Confirm vehicle fitment by year, make, and model before ordering, especially on Nissan Pickup, Nissan Pathfinder, Nissan D21, and INFINITI M30 applications.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation. The brand also notes more than 50 years of mobile air conditioning experience behind its HVAC replacement parts.