{"nhtsa_id":11029138,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-02","date":"2026-02-16","document_id":"SC357_TSB","mfr_campaign":"SC357","replaces":null,"component":"ELECTRICAL SYSTEM; ENGINE","mfr_system":null,"summary":"TECHNICAL 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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029138-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029138-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029138","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KIA","model":"TELLURIDE","year_from":2020,"year_to":2025,"match":"exact","vehicle_ids":["2020_kia_telluride","2021_kia_telluride","2022_kia_telluride","2023_kia_telluride","2024_kia_telluride","2025_kia_telluride"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}