Ford Mustang Mach E 2021–2024 — technical service bulletin
Bulletin SSM 54387 · NHTSA communication 11025810 · issued Nov 18, 2025
Technical service bulletin
communication type
Electrical System
component
2021–2024
model years
4
vehicle entries
Official summary
Some 2021-2024 Mustang Mach-E vehicles may exhibit a condition where the interior propulsion sound feature does not remain active and deactivates immediately. This may be due to the audio control module (ACM) configuration. To restore the functionality of this feature, download and run the "ACM - Enable Engine Sound Enhancement and Active Noise Control" application in the Ford Diagnosis and Repair System (FDRS) scan tool. In cases where the ACM is replaced, this routine will run during the "ACM - Programmable Module Installation (PMI)" application. Make sure to follow the FDRS on-screen instru
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.