{"nhtsa_id":10018788,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2006-01-17","date":"2005-11-08","document_id":"054A","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"CAMPAIGN 05C-4A - DETROIT DIESEL CORPORATION (DDC) HAS DETERMINED THAT CERTAIN 2003 THROUGH 2004 MODEL YEAR 275 BHP RATED SERIES 50 URBAN BUS ENGINES EQUIPPED WITH DIESEL PARTICULATE FILTERS WILL REQUIRE REPLACEMENT OF THE FILTER. DETROIT DIESEL. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10018788","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"DETROIT DIESEL","model":"SERIES 50","year_from":2003,"year_to":2004,"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":[]}