Help bring cabin heat and defrost back with the Agility Auto Parts HVAC Heater Core 9010668, a direct-fit 1999-2005 Mazda Miata heater core. The core routes hot engine coolant through its fin-and-tube element so the blower motor can push warmed air across it into the cabin for heat and defrost.
Thermal performance & corrosion resistance: Built with the latest fin and tube technology and enhanced design features for increased thermal performance and resistance to corrosion.
Drop-In Fit: Certified to meet or exceed OE specifications and fitment checked in the actual vehicle's HVAC heater module, so it's ready to install right out of the box.
Quality built: Engineered and manufactured under ISO TS16949 quality systems and 100% leak tested before it ships.
Signs the original may need replacing include a sweet coolant odor inside the cabin, fogged windows, damp floor carpet, or weak heat from the vents. If a leaking or clogged heater core is the cause, this replaces it — diagnose the source of any coolant loss before installing.
Interchange: 18-11888
1811888 · NC1061A10A · 99290 · 92128 · 98014
This part cross-references / interchanges with the following part numbers:
Does this heater core fit a 1999-2005 Mazda Miata?
Yes. MPN 9010668 is a direct-fit replacement for the 1999-2005 Mazda Miata. Check the Buyer's Guide tab to confirm your exact vehicle before ordering.
What does this heater core do?
It routes hot engine coolant through its fin-and-tube core; the blower pushes cabin air across the fins to provide heat and help defrost the windshield.
How do I know my heater core is failing?
Signs it may need replacing include a sweet coolant smell inside, fogged windows, damp floor carpet, or weak heat. Diagnose the cause of any coolant loss first.
Is this heater core leak tested?
Yes. Agility heater cores are 100% leak tested, built under ISO TS16949 quality systems, and certified to meet or exceed OE specifications.
What numbers does this heater core replace?
It interchanges with 18-11888 (1811888), NC1061A10A, 99290, 92128, and 98014.
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.
