Hyundai warranty extension LA21
What it saysCertain Tucson (NX4A) vehicles may experience Over-the-Air (OTA) update failures due to outdated Central Communication Unit (CCU) software. NHTSA’s full summary ↓
Hyundai filed this with NHTSA as a warranty extension dated May 5, 2026, received May 12, 2026, about the electrical system — 1 document under this number: 26-01-041H TSB. It names 2 model years (2025–2026). A warranty extension 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.
Certain Tucson (NX4A) vehicles may experience Over-the-Air (OTA) update failures due to outdated Central Communication Unit (CCU) software. This bulletin provides instructions to perform a software update for the CCU.
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 26-01-041H TSB | Warranty extension | May 5, 2026 | 11032590 | PDF, 679 KB |
What the document itself lists
The manufacturer titles it “CCU SOFTWARE UPDATE FOR OTA INITIALIZATION”.
Part the bulletin names
| Part number | Description | Qty |
|---|---|---|
| 91920-N7000 | UNIT | — |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 60DA07R0 | CCU Software Update (AP / MCU) | 0.4 hrs |
Read by machine from the document NHTSA serves (10 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 553 complaints with NHTSA since 2015. 147 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.
On the 2025 Hyundai Tucson, the 15 owners who gave an odometer reading for Electrical System reported it at a median of 5,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
While traveling the following have happened multiple times. It has already been serviced by the dealership who corrected all pending recalls and then informed me they could not replicate the problem. It has now happened since the vehicle was returned to me. This morning while driving at freeway speeds.
2026 Hyundai Tucson · Electrical System · filed with NHTSA Sep 17, 2026 · ODI 11764919
The HUD will disappear and warning lights will flash on the dashboard. It lasts for about five seconds. Sometimes it happens a few times in a row and then it might not occur again for a couple of days.
2025 Hyundai Tucson · Electrical System · filed with NHTSA Oct 16, 2026 · ODI 11771741
In depth: 2025 Hyundai Tucson electrical problems →
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 group46 other manufacturer communications filed against the Hyundai Tucson under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Hyundai list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| P38 | Service bulletin | Oct 29, 2026 | Certain Tucson (NX4, NX4A), Tucson Hybrid (NX4 HEV), and Tucson Plug-in Hybrid (NX4 PHEV) vehicles may be eligible for the installation of t… |
| 26-GI-003H | Service bulletin | Oct 27, 2026 | This bulletin provides information related to the navigation and head unit software changes introduced in the 2026 2nd Navigation Map and So… |
| 26-EM-014H | Service bulletin | Sep 16, 2026 | Some Tucson (TL) vehicles equipped with a 2.0L engine may exhibit a continued DTC P132600 after an ECM logic update has been performed per T… |
| 26-BE-025H | Service bulletin | Aug 21, 2026 | Some Tucson (NX4, NX4A, NX4M), Tucson Hybrid (NX4 HEV), and Tucson Plug-In Hybrid (NX4 PHEV) vehicles may exhibit a 12-volt battery drain du… |
| 26-EE-007H | Service bulletin | Jun 17, 2026 | Some Palisade (LX2), Tucson (NX4), and Tucson Hybrid (NX4 HEV) vehicles may experience battery drain due to continuous operation of the cool… |
| 26-GI-002H | Service bulletin | May 27, 2026 | This bulletin provides information related to the navigation and head unit software changes introduced in the 2026 1st Navigation Map and So… |
| 9C0 | Service campaign | Apr 8, 2026 | Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink functions. This may be due to an occasiona… |
| 26-EM-009H | Service bulletin | Mar 24, 2026 | Some Sonata (DN8) and Tucson (NX4/NX4A/NX4M) vehicles equipped with the 2.5L Theta III GDI engine may display a warning lamp and store Diagn… |
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 LA21 a recall?
No. A warranty extension 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 LA21 repair free?
A warranty extension 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 LA21 cover?
The manufacturer filed it against 2 model years: 2026 Hyundai Tucson, 2025 Hyundai Tucson. 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: 2025 – 2026 Tucson (NX4A): built 4 Jun 2025 – 11 Mar 2026 — the build date is on the certification label in the driver’s door jamb.