{"nhtsa_id":11033933,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-06-17","date":"2026-06-15","document_id":"PI2603_TSB","mfr_campaign":"PI2603","replaces":null,"component":"FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM","mfr_system":null,"summary":"TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: BMS BATTERY DIAGNOSTIC LOGIC IMPROVEMENT (PI2603) - This bulletin provides information regarding a Battery Management System (BMS) software update for certain 2020–2022MY Niro (DE EV) vehicles produced from June 2, 2020, through November 8, 2021. Kia has developed improved battery health monitoring software to enhance the BMS diagnostic performance of the high-voltage battery (HVB) cells produced by a specific supplier in the subject vehicles. This improved software will enhance the long-term issue detection capabilities of the high-voltage battery in the subject vehicles.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11033933-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11033933-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11033933","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KIA","model":"NIRO","year_from":2020,"year_to":2022,"match":"exact","vehicle_ids":["2020_kia_niro","2021_kia_niro","2022_kia_niro"]}],"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":[]}