Four Seasons 92177 HVAC Heater Core - Front

Four Seasons 92177 Heater Core for Toyota

The Four Seasons 92177 heater core is an aluminum HVAC replacement built for Toyota Sequoia and Toyota Tundra applications. It matches the listed OE-style dimensions and meets or exceeds OEM requirements for a direct-fit heating system repair.

Key Features

• Aluminum heater core construction for efficient heat transfer
• Core dimensions: 10-5/8 in. height, 4 in. width, 1 in. depth
• Tube size: 0.625 in. / 15.875 mm on both connections
• Meets or exceeds OEM specifications
• Direct replacement heater core for select Toyota HVAC systems

Fitment Details

• Fits 2009-2022 Toyota Sequoia, front heater core.
• Fits 2008-2021 Toyota Tundra, heater core.
• Fits 2007 Toyota Tundra, heater core, from 11/06.

This Four Seasons heater core, part number 92177, is used in the HVAC system to restore cabin heat when the original core is leaking, restricted, or no longer transferring heat properly. It is a practical replacement for Toyota Sequoia and Toyota Tundra models that need a heater core with the listed aluminum core design and OE-matching dimensions.

Common Repair Symptoms

• Weak or uneven cabin heat
• Coolant odor inside the vehicle
• Fogging or film on the windshield from heater core leakage
• Coolant loss with no visible external leak
• Restricted heater performance in cold weather

Installation Notes

Verify the vehicle year, model, and build date before installation, especially for 2007 Toyota Tundra applications noted as from 11/06. Confirm tube orientation and core dimensions against the original unit before reassembly. HVAC heater core replacement typically requires access to the heater case and careful coolant system service.

Quality Assurance

Four Seasons 92177 is listed as meeting or exceeding OEM requirements and is cross-referenced to APDI 9010540 and Gates 91177 for the same application.