Restore cabin heat with the Agility Autoparts HVAC Heater Core (MPN 9010645), a direct-fit Mazda 3 heater core replacement for the 2010-2013 Mazda 3 [All] and the 2012-2013 Mazda 3 Sport [All]. The heater core carries hot engine coolant through a finned core so the blower can push warm air into the cabin; when it clogs, corrodes, or leaks you may notice weak or no heat, a sweet coolant smell, fogged windows, or damp carpet — signs this Mazda 3 heater core may need replacing.
Country of origin: China.
Interchange: 18-12430
1812430 · 8561 · BBM561A10 · 92304 · 98045
This part cross-references / interchanges with the following part numbers:
Will this heater core fit my Mazda 3?
Yes. It is a direct-fit replacement for the 2010-2013 Mazda 3 [All] and the 2012-2013 Mazda 3 Sport [All]. Confirm your vehicle in the Buyer's Guide tab.
What is this heater core made of?
It uses an aluminum core with aluminum tanks and a fin-and-tube design intended for good thermal performance and corrosion resistance.
What are the connection sizes?
It has a 5/8 quick-connect inlet and a 0.625 in outlet pipe diameter, matching the module for a straightforward install.
How do I know my heater core needs replacing?
Common signs include weak or no cabin heat, a sweet coolant odor, fogged windows, or damp carpet. Diagnose the cause before replacing, as other components can produce these symptoms.
Is this heater core leak tested?
Yes. Agility heater cores are 100% leak tested and built under ISO TS16949 quality systems, certified to meet or exceed OE specifications.
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.
