One Stop Solutions 98786 HVAC Heater Core - Rear

OE-Style Heater Core Replacement

Restore cabin heat with this OSC Premium new HVAC heater core from One Stop Solutions. Part number 98786 is built for direct replacement use in rear HVAC systems on select Mercury Villager and Nissan Quest applications, with a drop-in fit that matches original form and function.

Designed for 1993-2002 Mercury Villager rear and 1993-1999 Nissan Quest rear applications, this heater core uses premium aluminum construction and is pressure tested before release. Part number 98786 also includes the foam and accessories needed for the unit itself, helping support a clean OE-style installation.

Key Features

• Drop-in fit, form, and function for direct replacement service
• Premium grade aluminum construction for added durability
• Cadmium-plated tubes inside and out to help resist premature failure
• Individually pressure tested for leak verification
• Built to address original design weaknesses in higher-mileage vehicles
• Includes necessary foam and accessories for the heater core assembly

Detailed Product Overview

This OSC Premium heater core is engineered as an aluminum replacement for copper-designed original units. It is made to match OE dimensions and performance expectations while using materials selected for long-term service in demanding HVAC environments. For Mercury Villager and Nissan Quest rear heater repair, 98786 provides a direct replacement solution that supports consistent cabin heat and dependable coolant transfer through the HVAC system.

This part cross-references Spectra Premium 94786 for the same application.

Common Problems It Can Help Solve

• Loss of cabin heat from a leaking or restricted heater core
• Coolant odor inside the vehicle from heater core seepage
• Fogging or film on interior glass caused by HVAC coolant leakage
• Reduced rear passenger heat output in Villager and Quest models
• Failures associated with aging copper-style heater core designs

Installation Notes and Tips

Verify rear HVAC configuration before installation and compare the original unit to part number 98786 for fitment, hose routing, and mounting alignment. Flush the cooling system and inspect related hoses, clamps, and seals before reassembly to help protect the new heater core from contamination or repeat failure.

Quality Assurance

Each heater core is individually pressure tested and manufactured using premium aluminum materials with cadmium-plated tubes for added corrosion resistance. OSC Premium designs these heater cores to match original equipment form and function while improving durability in high-mileage service.