Kia bulletin SC357
Kia filed this with NHTSA as a emissions communication dated Feb 21, 2026, received Feb 12, 2026, about the electrical system — 7 documents under this number: SC357_OWNR, SC357_TSB, SC357_STKR, SC357_POC and more. It names 6 model years (2020–2025). A emissions communication 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: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: ECU EMISSIONS SOFTWARE LOGIC IMPROVEMENT (SC357) - This bulletin provides information to upgrade the Engine Control Unit (ECU) system software to improve the emissions-related logic on 2020-2025MY Telluride (ON) vehicles equipped with the Lambda II 3.8L GDI engine, produced from January 9, 2019 through October 27, 2025. The subject vehicles may have engine calibrations that were not optimized for emissions standards under certain specific conditions, which may cause the vehicle to release air pollutants which exceed Federal and California standards.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SC357_OWNR | Emissions | Feb 21, 2026 | 11029044 | not yet checked |
| SC357_TSB | Service bulletin | Feb 16, 2026 | 11029138 | not yet checked |
| SC357_STKR | Emissions | Feb 12, 2026 | 11028790 | not yet checked |
| SC357_POC | Emissions | Feb 12, 2026 | 11028789 | not yet checked |
| SC357_QA | Emissions | Feb 12, 2026 | 11028788 | not yet checked |
| SC357_DPSM | Emissions | Feb 12, 2026 | 11028787 | not yet checked |
| SC357_DP | Emissions | Feb 12, 2026 | 11028786 | 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 SC357 a recall?
No. A emissions communication 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 SC357 repair free?
A emissions communication 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 SC357 cover?
The manufacturer filed it against 6 model years: 2025 Kia Telluride, 2024 Kia Telluride, 2023 Kia Telluride, 2022 Kia Telluride, 2021 Kia Telluride, 2020 Kia Telluride. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.