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Heater Core
This usually takes 5-15 seconds. We're pulling together fitment data,
OEM numbers, and community knowledge...
Dusting off the service manual...
💡 This page improves over time as the community adds casting photos and confirms fitment
Quick reference
Verify specific vehicle configurations as mid-cycle updates may affect compatibility.
Confirm the presence of any unique connectors or mounting differences in junkyard finds.
Context
The heater core for the 2018 Ford Mustang, OEM part number FR3Z-18476-A, is crucial for maintaining cabin comfort by heating the air supplied to the interior. When considering replacements, the part is compatible across the 2015 to 2022 Mustang models, though it is advisable to verify the mounting brackets and HVAC configurations, especially if swapping between V6 and V8 engines. Common failures include leaks or blockages, so inspect for signs of coolant leakage or insufficient heating. Installation typically requires disassembling parts of the dashboard; ensure all connectors are properly seated to avoid future issues. Always keep an eye out for the possibility of superseded parts such as FR3Z-18476-B, which may offer slight variations or improvements. Proper installation ensures longevity and optimal performance of your Mustang's heating system.
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Confirmed fitment
| Year | Make | Model | Engine | Confidence |
|---|---|---|---|---|
| 2018 | Ford | Mustang | 5L V8 Naturally Aspirated Coyote V8 (435hp) | 80% |
Available parts

Seller: Marketplace seller
$73
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