Buy OEM Mazda Part # UB3961A10 (UB39-61-A10). HVAC Heater Core. All Models. Heater Core - Repair or Replace Your vehicle’s heater core handles hot water from your engine’s cooling

Heater. Core.
HVAC Heater Core. Heat. HVAC.

HVAC Heater Core

Fits B2000, B2200, B2600

All Models.
Heater Core - Repair or Replace
Your vehicle’s heater core handles hot water from your engine’s cooling system and transfers the heat to the cabin in the form of comforting heat from your vents. A failed heater core can leak that water—which is also called coolant or antifreeze—onto the floor on the passenger side. If your Mazda needs to have the heater core replaced, it's a job best left to a Mazda trained technician.