Buy 2004 Mazda 3 2.3L M/T S Hatchback HVAC Heater Core (Rear). CX-9. Heater Core - Repair or Replace Make, Model, Needs - OEM Mazda Part # TD1161D10A (TD11-61-D10A)

Heater. Core. HeatE. Unit -. HVAC.
For Auxiliary HVAC. HVAC Heater Core. Included with: AC & Heater assembly.

HVAC Heater Core

Fits CX-9

CX-9.
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 2004 Mazda 3 needs to have the heater core replaced, it's a job best left to a Mazda trained technician.