{"nhtsa_id":11034574,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-07","date":"2026-06-22","document_id":"TSB260037","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution steps for various gaskets used on the engine which may be incompatible with organic acid technology (OAT) coolant, resulting in recurring coolant leaks. This is an update to a previously submitted communication.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034574-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034574-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11034574","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"N14","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"NH","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"NT","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":[]}