TSB ACM-26.S — Ford Software update
ACM-26.S is a software update on file with NHTSA for 2 Ford models, 2023–2024 model years, filed and re-filed as 2 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Quality improvements include: -Addresses a potential communication condition that may result in a loss of radio audio.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. ACM-26.S is filed as a software update, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years ACM-26.S names
| Vehicle | Model years |
|---|---|
| Ford Escape | 2023, 2024 |
| Ford Mustang Mach-E | 2023, 2024 |
Every document filed under ACM-26.S
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| ACM-26.S MachE | June 5, 2026 | Software update |
| ACM-26.S Escape | May 29, 2026 | Software update |
What ACM-26.S covers
Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB ACM-26.S?
ACM-26.S is a software update filed with NHTSA by Ford, covering 2 Ford models across the 2023–2024 model years. NHTSA's summary reads: Quality improvements include: -Addresses a potential communication condition that may result in a loss of radio audio.
Which vehicles does ACM-26.S cover?
NHTSA's file names Ford Escape (2023–2024); Ford Mustang Mach-E (2023–2024). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB ACM-26.S a recall, and is the repair free?
ACM-26.S is filed as a software update, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.
How do I get the full text of ACM-26.S?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under ACM-26.S, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under ACM-26.S. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.