TSB GSM-26.2651B — Ford Software update
GSM-26.2651B is a software update on file with NHTSA for the Ford Mustang Mach-E, 2021–2024 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Quality improvements include: - Updates the motor short failure detection logic to prevent Diagnostic Trouble Codes
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. GSM-26.2651B 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 GSM-26.2651B names
| Vehicle | Model years |
|---|---|
| Ford Mustang Mach-E | 2021, 2022, 2023, 2024 |
Every document filed under GSM-26.2651B
| Document ID | Filed | Type |
|---|---|---|
| GSM-26.2651B MachE | July 13, 2026 | Software update |
What GSM-26.2651B covers
Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB GSM-26.2651B?
GSM-26.2651B is a software update filed with NHTSA by Ford, covering the Ford Mustang Mach-E across the 2021–2024 model years. NHTSA's summary reads: Quality improvements include: - Updates the motor short failure detection logic to prevent Diagnostic Trouble Codes
Which vehicles does GSM-26.2651B cover?
NHTSA's file names Ford Mustang Mach-E (2021–2024). 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 GSM-26.2651B a recall, and is the repair free?
GSM-26.2651B 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 GSM-26.2651B?
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 GSM-26.2651B, 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 GSM-26.2651B. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.