Hyundai service campaign TCW
What it saysSome Kona (SX2) vehicles may experience battery drain due to faulty logic keeping the taillights illuminated while the vehicle is parked and turned off. NHTSA’s full summary ↓
Hyundai filed this with NHTSA as a service campaign dated Aug 8, 2025, received Aug 14, 2025, about the exterior lighting — 1 document under this number: 25-01-043H TSB. It names 2 model years (2024–2025). A service campaign 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 communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
Some Kona (SX2) vehicles may experience battery drain due to faulty logic keeping the taillights illuminated while the vehicle is parked and turned off. Follow the procedures outlined in this TSB to update the Body Domain Controller (BDC) to the latest software.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 25-01-043H TSB | Service campaign | Aug 8, 2025 | 11021865 | PDF, 624 KB |
What the document itself lists
The manufacturer titles it “BDC SOFTWARE UPDATE”.
Parts the bulletin names
| Part number | Description | Qty |
|---|---|---|
| 95400-BE100 | Kona (SX2) 1222 BDC-BCM | — |
| 95400-BE110 | — | — |
Read by machine from the document NHTSA serves (7 pages), read Sep 30, 2026. A part number is shown only where it matches Hyundai’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote.
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 2 model years this bulletin names have filed 97 complaints with NHTSA since 2015.
While driving at night with multiple occurances the headlights, infotainment, and gauge cluster seemingly cut out and completely turned off for about 10 seconds before the infotainment system would reboot bringing back the headlights and gauge cluster.
2024 Hyundai Kona · Exterior Lighting · filed with NHTSA Jan 24, 2025 · ODI 11638330
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 group2 other manufacturer communications filed against the Hyundai Kona under the same component group (exterior lighting), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 25-BD-012H | Service bulletin | Nov 6, 2025 | This bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytim… |
| TCWA | Service campaign | Aug 8, 2025 | Some Kona Electric (SX2 EV) vehicles may experience battery drain due to faulty logic keeping the taillights illuminated while the vehicle i… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Hyundai, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Hyundai TCW a recall?
No. A service campaign 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 TCW repair free?
A service campaign 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 TCW cover?
The manufacturer filed it against 2 model years: 2025 Hyundai Kona, 2024 Hyundai Kona. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: 2024-2025MY Kona (SX2): built 27 Apr 2024 – 11 Apr 2025 — the build date is on the certification label in the driver’s door jamb.