{"nhtsa_id":39323,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1995-11-01","date":"1995-02-01","document_id":"NTB94056A","mfr_campaign":null,"replaces":"NTB94-056","component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"1991-94 SENTRA GA16DE SPARK KNOCK. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/39323","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"NISSAN","model":"SENTRA","year_from":1991,"year_to":1994,"match":"exact","vehicle_ids":["1991_nissan_sentra","1992_nissan_sentra","1993_nissan_sentra","1994_nissan_sentra"]}],"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":[]}