Buy 2003 Ford F-150 4.6L Triton (Romeo) V8 A/T 4WD XLT Standard Cab Pickup Fleetside HVAC Heater Core - OEM Ford Part # H2MZ18476C (1L7Z18476AA, H2MZ-18476-C)

Heater Assembly - LESS Radiator. HVAC Heater Core.
For Primary HVAC. HVAC Heater Core.

HVAC Heater Core

Fits Blackwood, Expedition, F-150, F-150 Heritage, F-250, F-250 HD, F-250 Super Duty, Navigator

Blackwood. Expedition, Navigator. F150. F250 Pick-Up. FRONT AC.
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 2003 Ford F-150 needs to have the heater core replaced, it's a job best left to a Ford trained technician.