{"nhtsa_id":618516,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-04-14","date":"2001-01-01","document_id":"30344","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:IGNITION","mfr_system":null,"summary":"SPARK PLUGS THAT HAVE BEEN AFFECTED BY CORONA DISCHARGE THAT LEADS TO CORONA STAIN OR WHAT IS OFTEN REFERRED TO AS SPARK PLUG BLOW-BY. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/618516","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"ignition","name":"Ignition","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"JAGUAR","model":"XJ","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"JAGUAR","model":"XK","year_from":1997,"year_to":1997,"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":[]}