Lincoln over-the-air update TRM-26.A04
What it says26C10 Recall remedy -Addresses instances where the trailer lights and trailer brakes may not function NHTSA’s full summary ↓
Lincoln filed this with NHTSA as an over-the-air update dated Apr 7, 2026, received Apr 17, 2026, about the exterior lighting — 1 document under this number: TRM-26. A04 Navigator. It names 1 model year (2026). 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 communication26C10 Recall remedy -Addresses instances where the trailer lights and trailer brakes may not function
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TRM-26. A04 Navigator | Over-the-air update | Apr 7, 2026 | 11031379 | 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 1 model year this bulletin names have filed 1 complaint with NHTSA since 2015.
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 exterior lighting
Source: same model, same component group5 other manufacturer communications filed against the Lincoln Navigator under the same component group (exterior lighting), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM 55194 | Service bulletin | Sep 23, 2026 | Some 2021-2024 Mustang Mach-E, 2025-2026 Navigator and 2024 F-150 vehicles may exhibit inoperative welcome/approach detection lights. This m… |
| LDCMD-25.10.08 | Over-the-air update | Mar 3, 2026 | "Quality improvements include: -Addresses an intermittent resistance fault that defaults the system to the lowest setting. Although intensit… |
| LDCMC-25.10.08 | Over-the-air update | Mar 3, 2026 | "Quality improvements include: -Addresses an intermittent resistance fault that defaults the system to the lowest setting. Although intensit… |
| TCU-25.2.9.3 | Over-the-air update | Mar 2, 2026 | "26C10 Recall remedy -Addresses instances where the trailer lights and trailer brakes may not function" |
| SSM 54536 | Service bulletin | Jan 30, 2026 | Some 2025-2026 Navigator vehicles may experience condensation buildup within the reversing lamp assembly… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Lincoln, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Lincoln TRM-26.A04 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 TRM-26.A04 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 TRM-26.A04 cover?
The manufacturer filed it against 1 model year: 2026 Lincoln Navigator. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.