Kia over-the-air update SA591
What it saysThis bulletin provides information to improve the Intelligent Speed Limit Assist (ISLA) function on certain 2025MY Sorento (MQ4a PE) vehicles equipped with 2.5L T-GDI Theta Ⅲ engines produced from June 25, 2024 through… NHTSA’s full summary ↓
Kia filed this with NHTSA as an over-the-air update dated Oct 16, 2024, received Oct 23, 2024, about the electrical system — 2 documents under this number: OTA_SA591, TSB_ELE358. It names 1 model year (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: ISLA LOGIC IMPROVEMENT (SA591) - This bulletin provides information to improve the Intelligent Speed Limit Assist (ISLA) function on certain 2025MY Sorento (MQ4a PE) vehicles equipped with 2.5L T-GDI Theta Ⅲ engines produced from June 25, 2024 through August 8, 2024. When using Smart Cruise Control with ISLA enabled, an affected vehicle may not automatically update the cruise set speed to a new posted speed limit due to a software logic error. If this occurs, the driver can manually change the cruise set speed and/or deactivate the cruise control normally by using the steering wheel controls and brake pedal.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| OTA_SA591 | Over-the-air update | Oct 16, 2024 | 11009533 | not found |
| TSB_ELE358 | Service bulletin | Oct 15, 2024 | 11009073 | PDF, 373 KB |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 240A36R0 | ISLA Logic Improvement | 0.3 hrs |
Read by machine from the document NHTSA serves (5 pages), read Sep 30, 2026. A part number is shown only where it matches Kia’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 1 model year this bulletin names have filed 137 complaints with NHTSA since 2015. 51 of them name Electrical System, Forward Collision Avoidance — 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 am writing to report a safety concern with my 2025 Kia Sorento plug-in hybrid. On multiple occasions, after starting the vehicle, the instrument panel appears normal, but the vehicle does not enter the ready state. The ready indicator does not illuminate and the vehicle will not shift into drive or reverse.
2025 Kia Sorento · Electrical System · filed with NHTSA Aug 8, 2026 · ODI 11755646
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 Kia Sorento 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 |
|---|---|---|---|
| SA656 | Service bulletin | Sep 28, 2026 | TECHNICAL SERVICE BULLETIN: SERVICE ACTION: FRONT VIEW CAMERA REPLACEMENT (SA656) - This bulletin provides information to replace the front… |
| SC330 | Service campaign | Sep 25, 2026 | TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: MULTI-FUNCTION SWITCH REPAIR (SC330) - This bulletin provides information to repair… |
| TSB_CLI049_R2 | Service bulletin | Aug 28, 2026 | TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR - This bulletin has been revised to include additional information. N… |
| 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… |
| WTY042 | Warranty extension | Mar 26, 2026 | WARRANTY EXTENSION CAMPAIGN: DEALER PARTS & SERVICE MANAGER MEMO (WTY042) - This document is the announcement to the dealer Parts and Servic… |
| TSB_ELE394 | Service bulletin | Mar 26, 2026 | TECHNICAL SERVICE BULLETIN: AVN5.0W DTC P17A000 DAIGNOSTIC PROCEDURE - This bulletin provides information regarding a potential illuminated… |
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 SA591 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 SA591 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 SA591 cover?
The manufacturer filed it against 1 model year: 2025 Kia Sorento. 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: 2025MY Sorento (MQ4a PE): built 25 Jun 2024 – 8 Aug 2024; Sorento (MQ4a PE): built 25 Jun 2024 – 8 Aug 2024 — the build date is on the certification label in the driver’s door jamb.