{"nhtsa_id":10240751,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-08-17","date":"2023-07-21","document_id":"SB_406.12","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Identify options for dealing with multiple failure mode codes on various versions of DEF headers for 2016 and newer Cummins engines. This latest revision is to address production and service change from optical header 3539748 to ultrasonic header 3584091.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10240751-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10240751-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10240751","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"CUMMINS","year_from":null,"year_to":null,"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":[]}