Kia bulletin SA635
Kia filed this with NHTSA as a over-the-air update dated Feb 10, 2026, received Dec 24, 2025, about the electrical system — 4 documents under this number: OTA_SA635_R1, TSB_ELE406_R1, OTA_SA635, TSB_ELE406. It names 3 model years (2025–2026). A 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationTECHNICAL SERVICE BULLETIN: SERVICE ACTION: DCU OPERATIONSOFTWARE LOGIC IMPROVEMENT (SA635) - 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 improve the Data Connectivity Unit (DCU) performance on all 2026MYSportage and Sportage HEV/PHEV and 2025MY EV6 vehicles equipped with Kia Connect Services. The affected vehicles may encounter the following issues: Remote Start/Climate Control function not working, Vehicle Status on the Kia Access App not updating. and/or Connected routing not functioning properly.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| OTA_SA635_R1 | Over-the-air update | Feb 10, 2026 | 11029300 | not yet checked |
| TSB_ELE406_R1 | Service bulletin | Feb 10, 2026 | 11028737 | not yet checked |
| OTA_SA635 | Over-the-air update | Jan 15, 2026 | 11027674 | not yet checked |
| TSB_ELE406 | Service bulletin | Dec 24, 2025 | 11026827 | not yet checked |
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.
Common questions
Source: NHTSA, 49 CFR 579.5Is Kia SA635 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 SA635 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 SA635 cover?
The manufacturer filed it against 3 model years: 2026 Kia EV6, 2025 Kia EV6, 2026 Kia Sportage. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.