Kia over-the-air update SA594
What it saysThis bulletin provides the software upgrade procedure for certain 2024-2025MY EV9 (MV1) vehicles produced from September 25, 2023 through September 4, 2024. NHTSA’s full summary ↓
Kia filed this with NHTSA as an over-the-air update dated Jun 25, 2025, received Jan 16, 2025, about the electrical system — 2 documents under this number: OTA_SA594, TSB_ELE362. It names 2 model years (2024–2025). 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: SHIFT CONTROL UNIT LOGIC IMPROVEMENT (SA594) - This bulletin provides the software upgrade procedure for certain 2024-2025MY EV9 (MV1) vehicles produced from September 25, 2023 through September 4, 2024. The affected vehicles may experience the inability to shift out of ‘PARK’ accompanied with the DTC P28E812 stored due to the output shaft sensor signal exceeding the expected value.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| OTA_SA594 | Over-the-air update | Jun 25, 2025 | 11019737 | PDF, 114 KB |
| TSB_ELE362 | Service bulletin | Jan 8, 2025 | 11012905 | PDF, 394 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 2 model years this bulletin names have filed 233 complaints with NHTSA since 2015. 113 of them name Electrical System, Power Train — 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.
My 205 EV9 Wind with 24500 Miles left me stranded, the standard battery simbol that in ICE cards refers to the alternator, came on, I tried to get to the dealer about 20 miles in the way home, less that 3 miles after that the car lost power with just enough to move to the shoulder, I stopped, power the car off and tried turning it back…
2025 Kia EV9 · Electrical System · filed with NHTSA Oct 1, 2026 · ODI 11768404
The vehicle unexpectedly accelerates in multiple situations, all related to “iDrive” (one pedal driving), either failing to engage, or unexpectedly disengaging. It almost hit something while parking, and it started accelerating into oncoming traffic from a stop sign. I’ve driven the car for 60 miles.
2024 Kia EV9 · Power Train · filed with NHTSA Sep 2, 2024 · ODI 11612143
The vehicle digital instrument cluster turned off and wouldn’t show speed or any other information. The central infotainment screen and the climate control screen worked while driving. The turn signals were not working while this was happening either.
2024 Kia EV9 · Electrical System · filed with NHTSA Sep 15, 2024 · ODI 11614714
In depth: 2024 Kia EV9 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 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 SA594 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 SA594 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 SA594 cover?
The manufacturer filed it against 2 model years: 2025 Kia EV9, 2024 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 23 Sep 2023 – 4 Sep 2024 — the build date is on the certification label in the driver’s door jamb.