TSB TCU-25.2.9.3 — Ford and Lincoln Software update
TCU-25.2.9.3 is a software update on file with NHTSA for 2 Ford and Lincoln models, 2025 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. "26C10 Recall remedy -Addresses instances where the trailer lights and trailer brakes may not function"
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. TCU-25.2.9.3 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 TCU-25.2.9.3 names
| Vehicle | Model years |
|---|---|
| Ford Expedition | 2025 |
| Lincoln Navigator | 2025 |
Every document filed under TCU-25.2.9.3
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 |
|---|---|---|
| TCU-25.2.9.3 Expedition | March 2, 2026 | Software update |
| TCU-25.2.9.3 Navigator | March 2, 2026 | Software update |
What TCU-25.2.9.3 covers
Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB TCU-25.2.9.3?
TCU-25.2.9.3 is a software update filed with NHTSA by Ford and Lincoln, covering 2 Ford and Lincoln models across the 2025 model years. NHTSA's summary reads: "26C10 Recall remedy -Addresses instances where the trailer lights and trailer brakes may not function"
Which vehicles does TCU-25.2.9.3 cover?
NHTSA's file names Ford Expedition (2025); Lincoln Navigator (2025). 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 TCU-25.2.9.3 a recall, and is the repair free?
TCU-25.2.9.3 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 TCU-25.2.9.3?
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 TCU-25.2.9.3, 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 TCU-25.2.9.3. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.