TSB SC357 — Kia Emissions communication
SC357 is an emissions communication on file with NHTSA for the Kia Telluride, 2020–2025 model years, filed and re-filed as 7 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC357) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions software logic in the Electronic Control Module (ECM)…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years SC357 names
Every document filed under SC357
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| SC357_OWNR | February 21, 2026 | Emissions communication |
| SC357_TSB | February 16, 2026 | Service bulletin |
| SC357_DP | February 12, 2026 | Emissions communication |
| SC357_DPSM | February 12, 2026 | Emissions communication |
| SC357_QA | February 12, 2026 | Emissions communication |
| SC357_POC | February 12, 2026 | Emissions communication |
| SC357_STKR | February 12, 2026 | Emissions communication |
What SC357 covers
Electrical, Engine — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB SC357?
SC357 is an emissions communication filed with NHTSA by Kia, covering the Kia Telluride across the 2020–2025 model years. NHTSA's summary reads: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC357) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions software logic in the Electronic Control Module (ECM)…
Which vehicles does SC357 cover?
NHTSA's file names Kia Telluride (2020–2025). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB SC357 a recall, and is the repair free?
No. SC357 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of SC357?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under SC357, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under SC357. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.