{"nhtsa_id":604634,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-05-07","date":"1999-02-01","document_id":"120199","mfr_campaign":null,"replaces":"120385","component":"ELECTRICAL SYSTEM:IGNITION","mfr_system":null,"summary":"INFORMATION ON HIGH PERFORMANCE PLATINUM SPARK PLUG / SPARK PLUG APPLICATION CHART. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/604634","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"ignition","name":"Ignition","parent":"electrical"}],"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":[]}