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Front Left Window Regulator Assembly
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 compatibility for specific trim levels and optional features.
Consider potential differences in connectors between model years.
Context
When replacing the front left window regulator assembly on your 2018 Ford Mustang with the 5L V8 Coyote engine, it's crucial to use the correct OEM part, such as part number FR3Z-5423200-A. The 2015-2021 Ford Mustang models share similar window regulator assemblies, making it easier to find replacements at junkyards. Inspect for signs of wear, such as slow window movement or unusual noises when operating the window. Installation involves removing the door panel, disconnecting the electrical connectors, and securing the new regulator in place. Ensure that all connections are tight and test the window function before reassembling the door panel. Common failures may include the motor or cable fraying, so it's advisable to check these components during replacement.
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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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