{"nhtsa_id":51731,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-06-27","date":"1997-02-21","document_id":"BC3134970221","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:IGNITION","mfr_system":null,"summary":"OEM SPARK PLUGS MAY EXHIBIT A CONCERN OF AN OPEN CIRCUIT CAUSED BY AN INTERNAL CRACK. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/51731","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"ignition","name":"Ignition","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"EXPLORER","year_from":1997,"year_to":1997,"match":"exact","vehicle_ids":["1997_ford_explorer"]}],"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":[]}