Move hot engine coolant between the engine and the heater core with the Gates HVAC Heater Hose 18821 — the plumbing your climate system relies on to deliver cabin heat and keep coolant circulating. It installs as a direct-fit replacement for the listed applications, including the 1985-1992 Chevrolet Camaro, 1985-1992 Pontiac Firebird, 1986-1992 Toyota Supra, 2012-2022 Toyota Sequoia, and many more.
- Job it does: carries engine coolant to and from the heater core, feeding the HVAC system that warms the passenger cabin.
- Signs it may need replacing: visible coolant weeping or leaks, cracked, hardened, or swollen hose, or reduced cabin heat — diagnose the source before replacing, since other cooling components can share these symptoms.
- Fitment: a direct-fit replacement for the 28 applications listed in the Buyer's Guide tab.
If a failed or leaking heater hose is the cause, this replaces the original on the listed vehicles.
Interchange: 14122S · 70228126 · 228126 · 9240285E00 · 9241009G00 · 9241009G10 · 87675 · C87675 · B91024 · 10135306 · 25525788 · 63124 · 79722SL5A00 · MB167460 · MB527569 · 10821 · 872450C401 · 8724516050 · 8724516070 · 872451B220 · 8724534020 · 8724542420 · G922550100 · Manufacturer part number 18821.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does the Gates 18821 heater hose do?
It carries engine coolant between the engine and the heater core, supplying the hot coolant the HVAC system uses to warm the passenger cabin.
How do I know if my heater hose needs replacing?
Coolant leaks or weeping, cracked, hardened, or swollen hose, or reduced cabin heat can be signs. Diagnose the cause first, since other cooling parts can share these symptoms.
What vehicles does this hose fit?
It's a direct-fit replacement for 28 applications, including the 1985-1992 Chevrolet Camaro, 1985-1992 Pontiac Firebird, and 2012-2022 Toyota Sequoia — see the Buyer's Guide tab for the full list.
What numbers does this part interchange with?
It replaces numbers such as 14122S, 228126, 87675, MB167460, and many others; see the Interchange line above for every cross-reference number.
Is this listing for a single hose?
Yes, this listing is for the Gates HVAC Heater Hose 18821. Confirm the application for your vehicle in the Buyer's Guide before ordering.
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