Ford bulletin SSM 54388
Ford filed this with NHTSA as a service bulletin dated Nov 18, 2025, received Dec 1, 2025, about the fuel/propulsion system. It names 7 model years (2021–2025). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationSome 2021-2023 Mustang Mach-E vehicles equipped with nickel, cobalt and manganese (NCM) standard/extended range battery with minor feature codes HTHAD/HTHAE and 2022-2025 e-Transit vehicles equipped NCM standard range battery with minor feature codes HUKAL/HUKAA may require a high voltage battery module replacement. Technicians can now replace the affected battery module for high voltage batteries with a state of health (SOH) of 70% or higher. It is no longer necessary to replace the complete high voltage battery assembly for vehicles with 70% SOH or higher. Additionally, the battery health chart has been updated to display the actual battery SOH as a percentage and now requires the selection of checkboxes corresponding to the specific high voltage battery module(s) being replaced. After a high voltage battery module replacement and battery reinstallation, relaunch the Ford Diagnosis and Repair System (FDRS) "BECM - Battery Health" application which will prompt for confirmation of a successful repair.<br /><br /> To confirm a vehicle is built with a certain minor feature code, review the build information
Document filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| SSM 54388 | Service bulletin | Nov 18, 2025 | 11025811 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. Quote it at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ford SSM 54388 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the SSM 54388 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does SSM 54388 cover?
The manufacturer filed it against 7 model years: 2025 Ford E-Transit, 2024 Ford E-Transit, 2023 Ford E-Transit, 2022 Ford E-Transit, 2023 Ford Mustang Mach-E, 2022 Ford Mustang Mach-E and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.