{"nhtsa_id":10247605,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-12-22","date":"2023-12-15","document_id":"23-EM-009H","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING; POWER TRAIN","mfr_system":null,"summary":"Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler assembly. Follow the procedure outlined in this bulletin to repair this condition after confirming EHRS is leaking internally.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10247605-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10247605-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10247605","components":[{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"SONATA HYBRID","year_from":2020,"year_to":2023,"match":"base","vehicle_ids":["2020_hyundai_sonata","2021_hyundai_sonata","2022_hyundai_sonata","2023_hyundai_sonata"]}],"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":[]}