Four Seasons 94781 Copper/Brass Heater Core Replacement

The Four Seasons 94781 is a copper/brass replacement heater core engineered to restore proper cabin heating to your vehicle's HVAC system. Built to match OE fit, form, and function, this unit delivers reliable heat transfer performance as a direct replacement for the original factory heater core.

Four Seasons copper/brass heater cores use a traditional crimp-tank or V-cell construction style, utilizing copper tubes and brass tanks — the same materials used in OE heater cores of this design generation. This construction provides excellent thermal conductivity and durability, making it a dependable long-term replacement.

Key Features:

• Copper/brass construction for superior heat transfer and OE-matched material quality
• OE fit, form, and function — engineered to match factory specifications for a proper drop-in replacement
• Tested and validated for proven quality and performance before leaving the factory
• Backed by over 50 years of Four Seasons thermal management expertise
• Includes OE-style hardware and fittings for installation ease

Installing the Four Seasons 94781 heater core restores full heating capability to your vehicle, eliminates coolant leaks associated with a failed core, and helps prevent windshield fogging caused by heater core failure. Four Seasons is a trusted name in automotive HVAC, offering broad coverage across domestic and import applications.