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OEM numbers, and community knowledge...
Dusting off the service manual...
💡 This page improves over time as the community adds casting photos and confirms fitment
Rear/Secondary Evaporator 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
Wiki page
5L V8 Naturally Aspirated Coyote V8 (435hp).
Quick reference
Verify specific model year and trim compatibility prior to purchase.
Consider potential differences in connectors or mounting brackets across production years.
Context
For 2018 Ford Mustang owners equipped with the 5.0L Coyote V8 engine, the rear/secondary evaporator core, OEM part number FR3Z-19844-A, plays a crucial role in the vehicle's HVAC system. Common failures involve leaks or clogging, which can lead to reduced cooling efficiency. When inspecting this component, check for signs of corrosion or damage to the core fins, and ensure that the connectors are secure and free from debris. Installation requires careful handling to avoid damaging the surrounding components. This part may interchange with models from 2015 to 2020, but always verify mounting bracket differences and connector compatibility to ensure proper fitment. If sourcing from a junkyard, look for intact cores from similar Mustang models, as they often share the same design and function.
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Confirmed fitment
| Year | Make | Model | Engine | Confidence |
|---|---|---|---|---|
| 2018 | Ford | Mustang | 5L V8 Naturally Aspirated Coyote V8 (435hp) | 80% |
Available parts

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