{"nhtsa_id":11038458,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-10-14","date":"2026-10-08","document_id":"26-EM-016H TSB","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin outlines the combustion chamber cleaning procedure for vehicles diagnosed with this condition. All internal combustion engines consume some engine oil during normal operation, depending on driving conditions and mileage, and this procedure should only be performed when deemed necessary based on inspection and diagnosis of the vehicle as outlined in TSB 26-EM-015H, Engine Oil Consumption – Inspection & Repair Guidelines, or the latest revision.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038458-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038458-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11038458","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"ACCENT","year_from":2002,"year_to":2022,"match":"exact","vehicle_ids":["2002_hyundai_accent","2003_hyundai_accent","2004_hyundai_accent","2005_hyundai_accent","2006_hyundai_accent","2007_hyundai_accent","2008_hyundai_accent","2009_hyundai_accent","2010_hyundai_accent","2011_hyundai_accent","2012_hyundai_accent","2013_hyundai_accent","2014_hyundai_accent","2015_hyundai_accent","2016_hyundai_accent","2017_hyundai_accent","2018_hyundai_accent","2019_hyundai_accent","2020_hyundai_accent","2021_hyundai_accent","2022_hyundai_accent"]},{"make":"HYUNDAI","model":"ELANTRA","year_from":2002,"year_to":2026,"match":"exact","vehicle_ids":["2002_hyundai_elantra","2003_hyundai_elantra","2004_hyundai_elantra","2005_hyundai_elantra","2006_hyundai_elantra","2007_hyundai_elantra","2008_hyundai_elantra","2009_hyundai_elantra","2010_hyundai_elantra","2011_hyundai_elantra","2012_hyundai_elantra","2013_hyundai_elantra","2014_hyundai_elantra","2015_hyundai_elantra","2016_hyundai_elantra","2017_hyundai_elantra","2018_hyundai_elantra","2019_hyundai_elantra","2020_hyundai_elantra","2021_hyundai_elantra","2022_hyundai_elantra","2023_hyundai_elantra","2024_hyundai_elantra","2025_hyundai_elantra","2026_hyundai_elantra"]},{"make":"HYUNDAI","model":"ELANTRA 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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":[]}