Lincoln over-the-air update TCU-25.2.8.5
What it says"Quality improvements include: -Addresses a loss of connectivity caused by a Cellular Domain Service outage" NHTSA’s full summary ↓
Lincoln filed this with NHTSA as an over-the-air update dated Mar 17, 2026, received Jan 6, 2026, about the electrical system — 3 documents under this number: TCU-25.2.8.5 Corsair (2 filings), TCU-25.2.8.5 Nautilus. It names 4 model years (2024–2026). 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 communication"Quality improvements include: -Addresses a loss of connectivity caused by a Cellular Domain Service outage"
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TCU-25.2.8.5 Corsair | Over-the-air update | Mar 17, 2026 | 11030679 | PDF, 21 KB |
| TCU-25.2.8.5 Nautilus | Over-the-air update | Dec 5, 2025 | 11027119 | PDF, 22 KB |
| TCU-25.2.8.5 Corsair | Over-the-air update | Dec 5, 2025 | 11027118 | PDF, 22 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 4 model years this bulletin names have filed 75 complaints with NHTSA since 2015. 16 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
The contact owns a 2025 Lincoln Corsair. The contact stated that the turn signal noise was faint and could barely be heard by the driver. The contact stated that this failure could be a hazard to other drivers as the turn signal could be left on and the driver would not have any indication that the turn signal remained on.
2025 Lincoln Corsair · Electrical System · filed with NHTSA Jun 1, 2026 · ODI 11741273
During a short drive between and roughly 27 miles, the red battery light on the dash display illuminated just as we were turning into the Holiday/Circle K gas station in . No other warnings or messages appeared on the dash, and upon restart after returning to the vehicle, the red battery light did not reappear.
2025 Lincoln Nautilus · Electrical System · filed with NHTSA Aug 28, 2026 · ODI 11760280
The contact owns a 2025 Lincoln Corsair PHEV. The contact received notification of NHTSA Campaign Number: 26V091000 (Electrical System); however, the part to do the recall repair was not yet available. The contact stated that the vehicle intermittently stopped charging before reaching the set 80% charge limit.
2025 Lincoln Corsair · Electrical System · filed with NHTSA Apr 28, 2026 · ODI 11734311
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 electrical system
Source: same model, same component group116 other manufacturer communications filed against these Lincoln models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Lincoln list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB 26-2449 | Service bulletin | Oct 22, 2026 | This bulletin supersedes 26-2428. Reason for update: to update the Service Procedure to remove the fuel tank isolation valve replacement and… |
| SSM 55256 | Service bulletin | Oct 16, 2026 | Some 2024-2026 Nautilus and 2025-2027 Explorer/Aviator vehicles equipped with power folding mirrors may exhibit concerns with the auto foldi… |
| SSM 55247 | Service bulletin | Oct 15, 2026 | Some 2024-2026 Nautilus vehicles may experience an "Advance Front Lighting Features Temporarily Unavailable" message with diagnostic trouble… |
| TSB 26-2442 | Service bulletin | Oct 14, 2026 | This bulletin supersedes 26-2297. Reason for update: Add 2022-2025 Transit vehicles. Some of the vehicles listed in the model statement abov… |
| SSM 55221 | Service bulletin | Oct 6, 2026 | For 20222026 vehicles equipped with a 8F35 transmission, a revision to the Road Testing Vehicle procedure has been made in the WSM, Section… |
| SSM 55220 | Service bulletin | Oct 6, 2026 | Some 2024-2026 Nautilus and 2025-2026 Explorer/Aviator/Expedition/Navigator vehicles may experience Android Auto connection or general Bluet… |
| TCU-26.2.12.2.2 | Over-the-air update | Sep 16, 2026 | Quality improvements include: -Addresses a bug that may cause updates to fail |
| ECG-26.2.12.3 | Over-the-air update | Sep 16, 2026 | Quality improvements include: -ePrivacy enhancements |
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 TCU-25.2.8.5 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 TCU-25.2.8.5 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 TCU-25.2.8.5 cover?
The manufacturer filed it against 4 model years: 2026 Lincoln Corsair, 2025 Lincoln Corsair, 2025 Lincoln Nautilus, 2024 Lincoln Nautilus. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.