Ford Mustang Mach E 2023–2026 — technical service bulletin
Bulletin SSM 54995 · NHTSA communication 11035301 · issued Jul 9, 2026
Technical service bulletin
communication type
Electrical System
component
2023–2026
model years
4
vehicle entries
Official summary
Some 2023-2026 Mustang Mach-E vehicles equipped with a lithium iron/ion phosphate (LFP) standard range battery (minor feature code HTHAH) may exhibit a battery energy control module (BECM) state of health reading that over-estimates the actual high voltage battery state of health after a BECM replacement directed by the Workshop Manual (WSM). This may be due to the software in the BECM. To correct this condition, download and run the "BECM-High Voltage Battery Capacity Relearn" application using the Ford Diagnosis and Repair System (FDRS) scan tool. For claiming, use causal part 10B687 and lab
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.