Four Seasons 92357 HVAC Heater Core

Four Seasons 92357 Heater Core for Mazda 6

Restore cabin heat with the Four Seasons Heater Core 92357, a specific-fit aluminum heater core built for direct replacement in select Mazda 6 applications. It matches the original-style dimensions and tube sizing needed for a proper HVAC repair on 2003-2009 Mazda 6 models.

Key Features

• Specific-fit heater core for select Mazda 6 vehicles
• Aluminum core material for efficient heat transfer
• Core dimensions: 8-1/8 in. height, 5 in. width, 1 in. depth
• Tube size: 0.6875 in. / 17.4625 mm on both connections
• Meets or exceeds OEM requirements
• Four Seasons Heater Core line replacement part number 92357

Product Details

Four Seasons 92357 is an aluminum heater core designed for direct-fit HVAC service in the Mazda 6. With a specific-fit design and OEM-matching dimensions, it supports proper coolant flow through the heater system so the cabin can receive heat as intended. This heater core is listed for 2003-2009 Mazda 6 models, making it a focused solution for Mazda 6 heater core replacement and related HVAC repair work. The Four Seasons 92357 part number is also referenced by several aftermarket cross numbers for the same application.

The Four Seasons Heater Core product line is built around replacement HVAC components that follow vehicle-specific fitment and dimensional accuracy. For buyers searching for a 2003-2009 Mazda 6 heater core, Four Seasons 92357 provides the correct aluminum core style and connection sizing for a straightforward service match.

This part cross-references Dorman - HELP 91357 and Spectra Premium 98040 for the same application.

Common Issues This Part Can Address

• Weak or no cabin heat in a Mazda 6
• Coolant odor inside the vehicle from a leaking heater core
• Fogging or film on the windshield caused by HVAC coolant leakage
• Restricted heater performance from a clogged or corroded core
• HVAC service needs requiring a direct-fit heater core replacement

Installation Notes and Tips

Verify the vehicle year and HVAC configuration before installation. Confirm the inlet and outlet tube size, core height, width, and depth against the removed part to ensure proper alignment in the heater case. Because this is a specific-fit Mazda 6 heater core, careful handling during HVAC disassembly and reassembly helps prevent damage to the core, seals, and surrounding components.

Quality Assurance

Four Seasons 92357 is listed as meeting or exceeding OEM requirements and uses aluminum construction for the intended application. It is a direct replacement heater core for 2003-2009 Mazda 6 models.