Keep the cabin warm and the defrost working with the Agility Auto Parts HVAC Heater Core 9010488. This coolant-to-air heat exchanger routes hot engine coolant through its fin-and-tube core so blower air is warmed for cabin heat and windshield defrosting. It's a direct-fit replacement for the 1999-2005 Audi A6, 1999-2005 Audi A6 Quattro, 2001-2005 Audi Allroad Quattro, 2003-2004 Audi RS6, and 2001-2004 Audi S6 — see the Buyer's Guide tab for engine-level details.
Signs the original core may need replacing include a sweet coolant smell inside, fogged windows, damp carpet, weak or no cabin heat, or unexplained coolant loss. If a leaking or clogged heater core is the cause, this unit replaces it.
Interchange: 18-11784
1811784 · 4B1819031C · 99127 · 92001 · 99001
This part cross-references / interchanges with the following part numbers:
What does this heater core do?
It's a coolant-to-air heat exchanger that routes hot engine coolant through its fin-and-tube core so blower air is warmed for cabin heat and windshield defrosting.
Which vehicles does the 9010488 fit?
It's a direct-fit replacement for the 1999-2005 Audi A6 and A6 Quattro, 2001-2005 Audi Allroad Quattro, 2003-2004 Audi RS6, and 2001-2004 Audi S6. Check the Buyer's Guide tab.
What are signs my heater core may need replacing?
Common signs include a sweet coolant smell in the cabin, fogged windows, damp carpet, weak or no heat, and unexplained coolant loss. Diagnose the cause before replacing.
Is this heater core tested before it ships?
Yes. Agility heaters are engineered and manufactured under ISO TS16949 quality systems and are 100% leak tested.
Does it require modification to install?
No. It is fitment-checked in the actual vehicle's HVAC heater module and meets or exceeds OE specifications for a drop-in fit out of the box.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
