Ford over-the-air update ACM-26.S
What it saysQuality improvements include: -Addresses a potential communication condition that may result in a loss of radio audio. NHTSA’s full summary ↓
Ford filed this with NHTSA as an over-the-air update dated Jun 10, 2026, received Jun 4, 2026, about the electrical system — 3 documents under this number: ACM-26. S F-150, ACM-26. S MachE, ACM-26. S Escape. It names 5 model years (2023–2024). An over-the-air update is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationQuality improvements include: -Addresses a potential communication condition that may result in a loss of radio audio.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| ACM-26. S F-150 | Over-the-air update | Jun 10, 2026 | 11033806 | PDF, 22 KB |
| ACM-26. S MachE | Over-the-air update | Jun 5, 2026 | 11033807 | PDF, 22 KB |
| ACM-26. S Escape | Over-the-air update | May 29, 2026 | 11033540 | PDF, 21 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. 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. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number 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.
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What owners reported
Source: NHTSA complaint databaseOwners of the 5 model years this bulletin names have filed 637 complaints with NHTSA since 2015. 242 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On the 2023 Ford Escape, the 16 owners who gave an odometer reading for Electrical System reported it at a median of 15,500 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2023 Ford Mustang Mach-E. The contact stated while driving approximately 35 MPH, a MIL warning illuminated, with the message “Immediate Loss of Power” displayed. The contact stated that the vehicle shut off and the battery was drained. The contact stated that the vehicle stopped and independently shifted to park(P).
2023 Ford Mustang Mach-E · Electrical System · filed with NHTSA Dec 5, 2023 · ODI 11558645
After incomplete over-the-air (OTA) update instrument panel cluster (IPC) fails to illuminate and only chimes when powered. Vehicle drives normally, but no speed, fuel, warning telltales shown to the driver. Safety issue as the driver is not informed of this critical vehicle information
2023 Ford Escape · Electrical System · filed with NHTSA Aug 31, 2026 · ODI 11760838
I am reporting a serious safety defect involving the electronic front door latches on my 2024 Ford Mustang Mach E. During a 12V battery discharge, the electric latches can fail, preventing the doors from opening in the outside.
2024 Ford Mustang Mach-E · Electrical System · filed with NHTSA Aug 14, 2025 · ODI 11680603
In depth: 2023 Ford Escape electrical problems → · 2024 Ford F-150 electrical problems → · 2023 Ford Mustang Mach-E electrical problems →
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group277 other manufacturer communications filed against these Ford models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Ford list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB 26-2449 | Service bulletin | Oct 22, 2026 | This bulletin supersedes 26-2428. Reason for update: to update the Service Procedure to remove the fuel tank isolation valve replacement and… |
| 26-2431 v2 | Service bulletin | Oct 22, 2026 | This bulletin supersedes 26-2226. Reason for update: update the Service procedure for 2021-2022 F-150 3.5L EcoBoost vehicles with new Ford D… |
| TSB 26-2442 | Service bulletin | Oct 14, 2026 | This bulletin supersedes 26-2297. Reason for update: Add 2022-2025 Transit vehicles. Some of the vehicles listed in the model statement abov… |
| SSM 55221 | Service bulletin | Oct 6, 2026 | For 20222026 vehicles equipped with a 8F35 transmission, a revision to the Road Testing Vehicle procedure has been made in the WSM, Section… |
| 25E10-S1 | Emissions | Sep 30, 2026 | NEW VEHICLE DELIVERY HOLD - Emissions Recall 25E10 - Supplement #1 Certain 2018-2020 Model Year F-150 Vehicles With 3.3L Engines and 2016-20… |
| SSM 55208 | Service bulletin | Sep 25, 2026 | Some 2024-2026 F-150, 2025 Explorer/Aviator, 2025-2026 Expedition/Navigator, or 2026 F-Super Duty vehicles may exhibit diagnostic trouble co… |
| TCU-26.2.11.5 | Over-the-air update | Sep 24, 2026 | Quality improvements include: -Addresses key off load battery usage caused by the Telematics Control Unit's Wi-Fi not powering down properly… |
| 26B07 | Other | Sep 24, 2026 | Recommended Repair Prior to Sale Customer Satisfaction Program 26B07 Certain 2021-2025 Model Year F-150 Lightning and Mustang Mach-E Vehicle… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Ford, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ford ACM-26.S a recall?
No. A over-the-air update 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 ACM-26.S repair free?
A over-the-air update is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does ACM-26.S cover?
The manufacturer filed it against 5 model years: 2024 Ford Escape, 2023 Ford Escape, 2024 Ford F-150, 2024 Ford Mustang Mach-E, 2023 Ford Mustang Mach-E. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.