{"nhtsa_id":10168479,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-12-02","date":"2019-10-24","document_id":"08-056-19 REV. A","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; EQUIPMENT","mfr_system":null,"summary":"Flash: Active Noise Cancellation (ANC) Module Enhancements This bulletin involves updating the ANC system with the latest available software. The customer may describe one or more of the following inside the cabin: A drone noise. A booming sound. A humming noise. A muffled sound. A pulsing noise.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10168479-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10168479-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10168479","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"RAM","model":"1500","year_from":2019,"year_to":2019,"match":"exact","vehicle_ids":["2019_ram_1500"]}],"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":[]}