{"nhtsa_id":10204527,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-12-13","date":"2021-10-01","document_id":"B011021","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"During the vehicle's operational life, normal engine oil seepage or sweating, in addition to accumulated road dust, dirt and grime in the engine compartment can give an appearance that there is an active engine oil leak.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204527-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204527-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10204527","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BMW","model":"BMW","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}