Ford bulletin SYNC-26.2.1.6.5.2
Ford filed this with NHTSA as a over-the-air update dated Mar 31, 2026, received Mar 3, 2026, about the electrical system — 4 documents under this number: SYNC-26.2.1.6.5.2 SD, SYNC-26.2.1.6.5.2 MachE, SYNC-26.2.1.6.5.2 Transit, SYNC-26.2.1.6.5.2 E-Trans. It names 15 model years (2021–2024). A 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communication"26C10 Recall remedy -Addresses instances where the trailer lights and trailer brakes may not function"
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SYNC-26.2.1.6.5.2 SD | Over-the-air update | Mar 31, 2026 | 11030736 | not yet checked |
| SYNC-26.2.1.6.5.2 MachE | Over-the-air update | Mar 5, 2026 | 11030596 | not yet checked |
| SYNC-26.2.1.6.5.2 Transit | Over-the-air update | Feb 23, 2026 | 11029343 | not yet checked |
| SYNC-26.2.1.6.5.2 E-Trans | Over-the-air update | Feb 23, 2026 | 11029331 | not yet checked |
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 themAlso filed against model years this site has no page for: 2023 Ford F-550 SD; 2024 Ford F-550 SD.
A 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 SYNC-26.2.1.6.5.2 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 SYNC-26.2.1.6.5.2 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 SYNC-26.2.1.6.5.2 cover?
The manufacturer filed it against 15 model years: 2023 Ford E-Transit, 2024 Ford F-250 Super Duty, 2023 Ford F-250 Super Duty, 2024 Ford F-350 Super Duty, 2023 Ford F-350 Super Duty, 2024 Ford F-450 Super Duty and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.