Four Seasons 92451 HVAC Heater Core

Four Seasons 92451 Heater Core

The Four Seasons 92451 heater core is a specific-fit HVAC replacement built with an aluminum core and aluminum heater core construction. It is engineered and tested for dependable operation in the heating system, making it a direct choice for Subaru Tribeca and Subaru B9 Tribeca applications.

Key Features

• Specific-fit HVAC heater core for direct application matching
• Aluminum construction for efficient heat transfer
• Core dimensions: 10.69 in. wide, 4.5 in. high, 1 in. deep
• Tube size: 0.625 in. (15.88 mm) on both connections
• Built by Four Seasons, a brand with over 50 years of mobile A/C experience

Product Details

Four Seasons Heater Core 92451 is a replacement HVAC heater core designed around the listed dimensions and fitment requirements. It serves the cabin heating system by transferring heat from engine coolant into the vehicle’s HVAC air stream. This part cross-references Nissens 91451 for the same application. Compatible With 2008 Subaru Tribeca, Heater Core, and 2006-2007 Subaru B9 Tribeca, Heater Core. For Subaru Tribeca and Subaru B9 Tribeca owners searching for a heater core replacement, 92451 provides a specific-fit solution that aligns with the original application.

Common Problems This Part Can Address

• Loss of cabin heat
• Coolant odor inside the vehicle
• Interior windshield fogging from heater core leakage
• Restricted coolant flow through the HVAC heater circuit
• Temperature inconsistency from a failing heater core

Installation Notes and Tips

Verify the core dimensions and tube sizes before installation to confirm match-up with the vehicle’s HVAC housing and coolant lines. Drain the cooling system as required, inspect hoses and seals for wear, and flush the system if contamination is present. After installation, refill and bleed the cooling system according to Subaru service procedures to help prevent air pockets and restore proper heater performance.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation. Backed by more than 50 years of mobile A/C experience, the brand positions this heater core as a dependable replacement for the specified Subaru applications.