Genuine Audi Heater Core HVAC Heater Core 1K0819031D OEM A3 TT Q3 - Audi (1K0-819-031-D)

Genuine Audi OEM Heater Core is a factory-engineered replacement designed to restore precise cabin heating performance in compatible Audi models. This genuine component fits the Audi A3, TT, and Q3, ensuring a seamless, no-modification installation that aftermarket alternatives simply cannot guarantee. The heater core functions as a small radiator positioned within your HVAC system, circulating hot engine coolant through its fins to warm air before it enters the cabin. A failing or leaking heater core leads to foggy windows, a sweet coolant smell inside the vehicle, and loss of heat — issues that demand an exact-fit replacement. Choosing a genuine Audi heater core over an aftermarket unit matters because OEM cores are manufactured to match your vehicle's specific coolant flow rates, pressure tolerances, and fin density, reducing the risk of premature leaks or inefficient heating that poorly sourced alternatives commonly cause. Searching for an Audi A3 TT Q3 OEM Heater Core or the no-dash part number 1K0819031D confirms this is the same component installed at the factory — not a close approximation. Whether you know it as an HVAC Heater Core or simply a heatercore, this is the correct, warranted solution. Audi Henderson is an authorized Audi dealer, and this part comes backed by the manufacturer's warranty for complete peace of mind.