Keep warm cabin air flowing in your classic GM coupe with the Agility Auto Parts heater core (P/N 9010299) — a Buick Regal heater core that drops right in as a direct-fit replacement for the 1985-1986 Buick Regal. The heater core circulates hot engine coolant through its fin-and-tube matrix so the blower can push warmed air into the passenger compartment; if the original is leaking coolant, fogging the windshield, or no longer putting out heat, this replaces it.
- Enhanced thermal design: uses the latest fin and tube technology for increased thermal performance and resistance to corrosion.
- Certified to OE specs: meets or exceeds OE specifications and is fitment-checked in the actual vehicle's HVAC heater module for a drop-in fit right out of the box.
- Quality-built and tested: engineered and manufactured under ISO TS16949 quality systems and 100% leak tested.
- Broad coverage: part of Agility's complete heater line spanning 94% of North American vehicle applications, stocked in Canadian and U.S. warehouses for timely delivery.
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. See the Buyer's Guide tab to confirm fitment for your vehicle.
What does a heater core do?
It circulates hot engine coolant through a fin-and-tube matrix so the blower motor can push warmed air into the cabin for heat and defrost.
What are signs my heater core may need replacing?
Common signs include little or no heat from the vents, a sweet coolant smell, a fogged-up windshield, or coolant leaking onto the passenger floor.
Is this heater core tested for leaks?
Yes. Agility heaters are 100% leak tested and built under ISO TS16949 quality systems, meeting or exceeding OE specifications.
Does it install without modifications?
It is fitment-checked in the actual vehicle's HVAC heater module for a drop-in fit right out of the box on the listed applications.
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