{"nhtsa_id":10141830,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-18","date":"2018-02-26","document_id":"DOC-1033297","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE","mfr_system":null,"summary":"SS 1033297: WST 4900 Low Max Exhaust Pipe Installation improvements","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10141830-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10141830-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10141830","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"exhaust-pipe","name":"Exhaust manifold, pipes and muffler","parent":"exhaust-emissions"}],"codes":[],"topics":[],"vehicles":[{"make":"WESTERN STAR","model":"4900","year_from":2017,"year_to":2019,"match":"exact","vehicle_ids":["2017_western-star_4900","2018_western-star_4900","2019_western-star_4900"]}],"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":[]}