{"nhtsa_id":11030344,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-31","date":"2026-03-20","document_id":"TSB_ELE413","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":"ELE","summary":"TECHNICAL SERVICE BULLETIN: DCU COMMUNICATION LOGIC IMPROVEMENT - This bulletin provides the procedure to upgrade the Data Connectivity Unit (DCU) system software on some 2025–2026MY vehicles listed in the table below. Kia has identified that Connected Car Services (CCS) functionality may intermittently fail due to temporary DCU communication issues. This condition can impact convenience and connectivity features by causing the Remote Start and Remote Climate functions to become inoperative, prevent vehicle status updates in the Kia Access app, and interrupt connected navigation routing services.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030344-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030344-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11030344","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KIA","model":"CARNIVAL","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_kia_carnival","2026_kia_carnival"]},{"make":"KIA","model":"CARNIVAL HYBRID","year_from":2025,"year_to":2026,"match":"base","vehicle_ids":["2025_kia_carnival","2026_kia_carnival"]},{"make":"KIA","model":"EV9","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_kia_ev9","2026_kia_ev9"]},{"make":"KIA","model":"K4","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_kia_k4","2026_kia_k4"]},{"make":"KIA","model":"K5","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_kia_k5","2026_kia_k5"]},{"make":"KIA","model":"SORENTO","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_kia_sorento","2026_kia_sorento"]},{"make":"KIA","model":"SORENTO HYBRID","year_from":2025,"year_to":2026,"match":"base","vehicle_ids":["2025_kia_sorento","2026_kia_sorento"]}],"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":[]}