Keep warm air moving through the cabin with the FOUR SEASONS heater core 92003, an aluminum heater core built to install in the listed Audi applications. It fits the 2002-2009 Audi A4 and A4 / A4 Quattro, 2002-2009 Audi A4 Quattro, 2007-2008 Audi RS4, 2004-2009 Audi S4, 2004 Audi S3, and 2004 Audi S6 — see the Buyer's Guide tab for the full engine-level list.
Mounted inside the HVAC case, the heater core routes hot engine coolant through its tubes and fins while the blower pushes air across it to warm the cabin and help clear the windshield. If a leaking or clogged core is the cause of weak heat, fogged glass, a sweet coolant odor, or dampness on the floor, this replaces it.
Interchange: 9010577 · 8E1820031 · 551003 · 99373 · 8231511 · 70226 · 98723 · 2754362 · 399936 · 1812395 · HT2179C
This part cross-references / interchanges with the following part numbers:
What vehicles does the Four Seasons 92003 heater core fit?
It fits the 2002-2009 Audi A4 and A4 / A4 Quattro, 2007-2008 Audi RS4, 2004-2009 Audi S4, 2004 Audi S3, and 2004 Audi S6. Check the Buyer's Guide tab to confirm your exact vehicle and engine.
What does an hvac heater core do?
It routes hot engine coolant through its tubes and fins, and the blower pushes air across it to warm the cabin and help defrost the windshield.
What are the signs my heater core may need replacing?
Common signs include weak or no heat from the vents, a sweet coolant smell inside, foggy windows, or coolant dampness on the passenger floor. Diagnose the cause before replacing.
What is this heater core made of?
It is an aluminum heater core, as specified by the manufacturer.
What other part numbers does this heater core replace?
It cross-references 9010577, 8E1820031, 551003, 99373, 8231511, 70226, 98723, 2754362, 399936, 1812395, and HT2179C.
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.
