{"nhtsa_id":635463,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-23","date":"2002-05-01","document_id":"110102","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"THIS BULLETIN STATES DUE TO SURFACE FINISH PROBLEMS DURING PRODUCTION OF THE VIBRATION DAMPER / PULLEY ASSEMBLY, THE PULLEY'S ATTACHMENT TO THE VIBRATION DAMPER HUB MAY LOOSEN, CAUSING A LACK OF POWER TRANSMISSION TO THE BELT DRIVEN COMPONENTS, SUPERCHARGER, WATER PUMP AND ALTERNATOR USED ON R53 COOPER S WITH 211 ENGINE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/635463","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":[]}