Bring warm air back to the cabin with the Agility Auto Parts HVAC Heater Core, part number 9010299. It installs as a direct-fit replacement for the 1985-1986 Buick Regal (see the Buyer's Guide tab for engine-level applications). The heater core routes hot engine coolant through its core so the blower can push heated air into the passenger compartment for defrost and cabin warmth.
- Enhanced core design: uses the latest fin and tube technology for increased thermal performance and resistance to corrosion.
- OE-level build: certified to meet or exceed OE specifications and fitment-checked in the vehicle's actual HVAC heater module for a drop-in fit right out of the box.
- Quality tested: engineered and manufactured under ISO TS16949 quality systems and 100% leak tested.
- Broad coverage: part of Agility's complete heater line covering a wide range of North American vehicle applications.
Signs the original core may need replacing include a sweet coolant smell inside the cabin, foggy windows, coolant residue on the passenger-side floor, or weak heat output. If a failed heater core is the cause, this unit replaces it.
Interchange: 18-12429
1812429 · 60041 · 8242 · 3056515 · 98488 · 98488A · 398242 · 94488
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicle does this heater core fit?
It is a direct-fit replacement for the 1985-1986 Buick Regal. Check the Buyer's Guide tab to confirm the exact application for your vehicle.
What does a heater core do?
It routes hot engine coolant through its fin-and-tube core so the blower can push heated air into the cabin for warmth and defrosting.
How do I know if my heater core is failing?
Common signs include a sweet coolant odor in the cabin, fogged windows, coolant on the passenger floor, or weak heat. Diagnose the cause before replacing.
Is this core tested for leaks?
Yes. Agility heaters are 100% leak tested and built under ISO TS16949 quality systems, and are certified to meet or exceed OE specifications.
What numbers does this part interchange with?
It cross-references 18-12429, 1812429, 60041, 8242, 3056515, 98488, 98488A, 398242, and 94488.
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