{"nhtsa_id":10203274,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-11-06","date":"2021-10-11","document_id":"21-AT-017H","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":": Certain vehicles equipped with 8-speed automatic transmission may experience an automatic transmission fluid (ATF) leak at the rear cover. This type of leak is caused by a porous casting on the rear cover of the transmission.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203274-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203274-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10203274","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"SANTA FE","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_hyundai_santa-fe"]},{"make":"HYUNDAI","model":"SONATA","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_hyundai_sonata"]},{"make":"HYUNDAI","model":"TUCSON","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_hyundai_tucson"]}],"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":[]}