{"nhtsa_id":635609,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-29","date":"2002-06-19","document_id":"4834","mfr_campaign":null,"replaces":null,"component":"STEERING:HYDRAULIC POWER ASSIST SYSTEM","mfr_system":null,"summary":"COMPLAINTS FOR HYDRAULIC OIL LOSS FROM THE POWER STEERING EXANSION TANK. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/635609","components":[{"id":"steering","name":"Steering","parent":null},{"id":"power-steering","name":"Power steering","parent":"steering"}],"codes":[],"topics":[],"vehicles":[{"make":"PORSCHE","model":"911 CARRERA","year_from":2002,"year_to":2002,"match":"base","vehicle_ids":["2002_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":[]}