One Stop Solutions 98791 HVAC Heater Core - Front

OE-Style Heater Core for Toyota 4Runner

This One Stop Solutions heater core is built for direct replacement in 1984-1995 Toyota 4Runner front HVAC applications. Part number 98791 is engineered around original equipment form and function, with aluminum construction and pressure testing for consistent fit and performance.

Key Features

• Drop-in fit, form, and function for the original heater core location
• Premium-grade aluminum construction for added service life
• Cadmium-plated tubes inside and out to help resist premature failure
• Individually pressure tested before release
• Includes the necessary foam and related accessories for installation
• Built to address common original design weaknesses in higher-mileage vehicles

Detailed Description

One Stop Solutions 98791 is a premium new HVAC heater core for the Toyota 4Runner front heater system. It is made from aluminum as a direct replacement for copper-designed heater cores, and it follows OE-style dimensions and function for straightforward service work. This part cross-references Nissens 94179 for the same application.

For 1984-1995 Toyota 4Runner front HVAC repair, this heater core is designed to restore heat transfer performance while using materials selected for durability in demanding temperature and vibration conditions. The part number 98791 is a practical choice when replacing a leaking, restricted, or corroded core in a high-mileage Toyota 4Runner.

Common Issues This Part Can Address

• Loss of cabin heat from a leaking or internally restricted heater core
• Coolant odor or moisture inside the vehicle from heater core failure
• Reduced heating performance in 1984-1995 Toyota 4Runner front HVAC systems
• Premature wear related to vibration, thermal cycling, or environmental exposure
• Replacement of an original copper-style core with an aluminum direct-fit unit

Installation Notes and Tips

Verify the vehicle year, front HVAC position, and core dimensions before installation. Inspect hoses, clamps, seals, and surrounding HVAC components during service, and transfer any reusable components only if they are in good condition. Proper coolant refill and system bleeding are important after heater core replacement.

Quality Assurance

Each heater core is individually pressure tested, and the design uses premium materials with cadmium-plated tubes to support durability. The unit is built to OE-style form and function for 1984-1995 Toyota 4Runner front applications.