{"nhtsa_id":603128,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-02-03","date":"1998-01-01","document_id":"2870","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:IGNITION","mfr_system":null,"summary":"TECHNICAL INFORMATION REGARDING NEW SPARK PLUGS. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/603128","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"ignition","name":"Ignition","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"PORSCHE","model":"911","year_from":1999,"year_to":1999,"match":"exact","vehicle_ids":["1999_porsche_911"]}],"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":[]}