{"nhtsa_id":11035222,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-25","date":"2026-07-31","document_id":"TMP500001.00","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"This procedure defines the requirements and methodology for flushing and cleaning the driveline coolant circuits of an Enviro 500 DSL double deck bus, including the engine cooling circuit, gearbox cooling circuit, radiator, and header tank, following contamination by grease, oil, degraded coolant, or particulate matter.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035222-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035222-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11035222","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"ALEXANDER DENNIS","model":"ENVIRO 500","year_from":2024,"year_to":2024,"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":[]}