Four Seasons 90072 HVAC Heater Core - Front

Four Seasons 90072 Heater Core Overview

The Four Seasons 90072 heater core is an aluminum HVAC heater core built for direct replacement service in select Toyota trucks and SUVs. It is engineered to meet or exceed OEM requirements and is sized for the factory heater core location in the front HVAC system.

Compatible With 2001-2008 Toyota Sequoia, front heater core applications and 2003-2007 Toyota Tundra heater core applications, this part number 90072 supports restoration of cabin heat performance when the original core is leaking, restricted, or no longer transferring heat properly.

Key Features

• Brand: Four Seasons Heater Core
• Part number: 90072
• Aluminum heater core construction
• Core material: aluminum
• Core dimensions: 8-1/2 in. length, 7 in. width, 1-1/4 in. thickness
• Core height: 8.500 in.; core width: 7.000 in.; core depth: 1.250 in.
• Tube size: 0.625 in. / 15.875 mm on both connections
• Meets or exceeds OEM specifications
• Designed for front HVAC heater core service

Product Details

The Four Seasons heater core line focuses on replacement HVAC heat exchangers for vehicles that need accurate fit and dependable thermal transfer. This aluminum heater core uses a compact core design with 8-1/2 inch height and 7 inch width, making it suitable for the factory HVAC case in the listed Toyota applications. The 90072 part number is also cross-referenced by APDI 9010404 for the same application.

For Toyota Sequoia and Toyota Tundra owners, this heater core is a direct-fit service part for restoring warm air output through the cabin HVAC system. Its aluminum construction and OEM-level sizing help maintain proper coolant flow through the heater circuit and consistent heat exchange at the core.

Common Problems This Part Can Address

• Loss of cabin heat from a leaking or clogged heater core
• Sweet coolant odor inside the vehicle from heater core seepage
• Fogging or film on the windshield caused by HVAC coolant leakage
• Uneven or weak heat output from the front HVAC system
• Coolant loss traced to the heater core area

Installation Notes and Tips

Verify the vehicle build date and HVAC configuration before ordering. This part fits 2001-2008 Toyota Sequoia, front, and 2003-2007 Toyota Tundra heater core applications, including 2007 Tundra built to 11/06 and 2003 Tundra from 8/02. Confirm tube orientation and case dimensions against the original unit before installation. Proper system flushing and coolant refill are recommended after heater core replacement.

Quality Assurance

Four Seasons lists this heater core as meeting or exceeding OEM requirements, making it a specification-based replacement for factory-style HVAC repair. Part number 90072 is built to the listed dimensions and connection sizes for accurate service in the specified Toyota applications.