{"nhtsa_id":10054667,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2014-02-13","date":"2013-12-01","document_id":"WSB-49-11","mfr_campaign":null,"replaces":null,"component":"FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY","mfr_system":null,"summary":"WESTERN STAR: WHEN TRUCK SITS, FOR ANY EXTENDED PERIOD, WITH A DIESEL EXHAUST FLUID (DEF) SYSTEM, IT WOULD CRYSTALLIZED, IN THE TANK, AROUND FLOAT, ON DEF LEVEL SENDING UNIT TUBE AND NEEDS TO BE CLEANED. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10054667","components":[{"id":"fuel-system","name":"Fuel system","parent":null},{"id":"fuel-tank","name":"Fuel tank","parent":"fuel-system"}],"codes":[],"topics":[],"vehicles":[{"make":"WESTERN STAR","model":"4700","year_from":2009,"year_to":2014,"match":"exact","vehicle_ids":["2009_western-star_4700","2010_western-star_4700","2011_western-star_4700","2012_western-star_4700","2013_western-star_4700","2014_western-star_4700"]},{"make":"WESTERN STAR","model":"4900","year_from":2004,"year_to":2014,"match":"exact","vehicle_ids":["2004_western-star_4900","2005_western-star_4900","2006_western-star_4900","2007_western-star_4900","2008_western-star_4900","2009_western-star_4900","2010_western-star_4900","2011_western-star_4900","2012_western-star_4900","2013_western-star_4900","2014_western-star_4900"]},{"make":"WESTERN STAR","model":"4900 SA","year_from":2002,"year_to":2011,"match":"base","vehicle_ids":["2002_western-star_4900","2003_western-star_4900","2004_western-star_4900","2005_western-star_4900","2006_western-star_4900","2007_western-star_4900","2008_western-star_4900","2009_western-star_4900","2010_western-star_4900","2011_western-star_4900"]},{"make":"WESTERN STAR","model":"4900EX","year_from":2006,"year_to":2007,"match":"base","vehicle_ids":["2006_western-star_4900","2007_western-star_4900"]},{"make":"WESTERN STAR","model":"6900","year_from":2004,"year_to":2014,"match":"exact","vehicle_ids":["2004_western-star_6900","2005_western-star_6900","2006_western-star_6900","2007_western-star_6900","2008_western-star_6900","2009_western-star_6900","2010_western-star_6900","2011_western-star_6900","2012_western-star_6900","2013_western-star_6900","2014_western-star_6900"]},{"make":"WESTERN STAR","model":"CONSTELLATION","year_from":2009,"year_to":2012,"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":[]}