{"nhtsa_id":11026533,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-12-10","date":"2025-12-10","document_id":"SC340_TSB_R3","mfr_campaign":"SC340","replaces":null,"component":"ENGINE","mfr_system":null,"summary":"TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to upgrade the Electronic Control Module ‘ECM’ system software for certain 2016-2022MY vehicles equipped with 2.4L Theta II engines listed in the table below. Kia has become aware that certain 2016-2022MY vehicles equipped with 2.4L Theta II engines may have engine calibrations that were not optimized for emissions standards under certain specific conditions. These calibrations may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect your health and welfare from the dangers of air pollution.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11026533-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11026533-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11026533","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KIA","model":"OPTIMA","year_from":2018,"year_to":2020,"match":"exact","vehicle_ids":["2018_kia_optima","2019_kia_optima","2020_kia_optima"]},{"make":"KIA","model":"SORENTO","year_from":2018,"year_to":2020,"match":"exact","vehicle_ids":["2018_kia_sorento","2019_kia_sorento","2020_kia_sorento"]},{"make":"KIA","model":"SPORTAGE","year_from":2018,"year_to":2022,"match":"exact","vehicle_ids":["2018_kia_sportage","2019_kia_sportage","2020_kia_sportage","2021_kia_sportage","2022_kia_sportage"]}],"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":[]}