{"nhtsa_id":10027024,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-01-07","date":"2008-10-31","document_id":"944","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT","mfr_system":null,"summary":"HARLEY DAVIDSON MOTORCYCLE: HAVE REVISED BREATHER PLUG PARTS TO IMPROVE THE SEALING CHARACTERISTICS. OCCASIONALLY BREATHER PLUG WILL HAVE ISSUES WITH INADEQUATE SEALING OF THE BREATHER PLUG TO THE BACK PLATE. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10027024","components":[{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HARLEY-DAVIDSON","model":"AIR CLEANER","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":[]}