Kia over-the-air update SA634
What it saysThis bulletin has been revised to include additional information. NHTSA’s full summary ↓
Kia filed this with NHTSA as an over-the-air update dated Jan 6, 2026, received Dec 1, 2025, about the electrical system — 3 documents under this number: OTA_SA634, TSB_ELE405_R1, TSB_ELE405. 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 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.
TECHNICAL SERVICE BULLETIN: SERVICE ACTION: VCU OPERATION LOGIC IMPROVEMENT (SA634) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to upgrade the Vehicle Control Unit (VCU) system software on certain 2026MY EV9 (MV1a) vehicles produced from January 2, 2025 through November 3, 2025, where the Integrated Electronic Brake (IEB) Controller Area Network (CAN) times out on startup, resulting in a DTC warning light and failure to restart charging when the connector remains connected after charging is completed. This condition is not associated with any braking or drivability symptoms.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| OTA_SA634 | Over-the-air update | Jan 6, 2026 | 11027451 | PDF, 143 KB |
| TSB_ELE405_R1 | Service bulletin | Dec 18, 2025 | 11026752 | PDF, 563 KB |
| TSB_ELE405 | Service bulletin | Nov 7, 2025 | 11025763 | PDF, 630 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 28 complaints with NHTSA since 2015. 12 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.
I was sold a vehicle with a manufacturer defect. At purchase there was a loud wind noise coming from sunroof. I was promised a swift service department visit to realign the sunroof. At service visit ten days later the dealership replaced sunroof and threw electrical error codes B271100.
2026 Kia EV9 · Electrical System · filed with NHTSA Sep 10, 2026 · ODI 11763485
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 group41 other manufacturer communications filed against the Kia EV9 under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Kia list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PI2601B | Other | Sep 1, 2026 | PRODUCT IMPROVEMENT CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (PI2601B) - This document is the announcement to the dealer Parts and Se… |
| TSB_ELE427 | Service bulletin | Aug 11, 2026 | TECHNICAL SERVICE BULLETIN: VEHICLE-TO-EVERYTHING (V2X) SOFTWARE UPGRADE - This bulletin provides information to install the Vehicle-to-Ever… |
| OTA_ELE427_RELEASE_NOTES | Over-the-air update | Aug 11, 2026 | OVER-THE-AIR: OVER-THE-AIR SOFTWARE UPDATE FOR COMMUNICATION CONTROL UNIT: This Over-the-Air (OTA)software update is designed to update the… |
| ELE413 | Over-the-air update | Jun 18, 2026 | RELEASE NOTES: OVER-THE-AIR: SOFWARE UPDATE FOR DATA CONNECTIVITY (ELE413) - This Over-the-Air (OTA) software update is designed to update t… |
| TSB_ELE422 | Service bulletin | May 28, 2026 | TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE. KIA. COM - This bulletin provides information and service proc… |
| TSB_ELE417 | Service bulletin | Apr 14, 2026 | TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE - This bulletin provides information on the process for downloading infot… |
| TSB_ELE413 | Service bulletin | Mar 20, 2026 | TECHNICAL SERVICE BULLETIN: DCU COMMUNICATION LOGIC IMPROVEMENT - This bulletin provides the procedure to upgrade the Data Connectivity Unit… |
| SC360 | Service campaign | Feb 6, 2026 | TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: EF31 CONNECTOR BRACKET REPLACEMENT (SC360) - This bulletin provides information on r… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Kia, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Kia SA634 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 SA634 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 SA634 cover?
The manufacturer filed it against 1 model year: 2026 Kia EV9. 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: built 2 Jan 2025 – 3 Nov 2025 — the build date is on the certification label in the driver’s door jamb.