{"nhtsa_id":10202122,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-10-07","date":"2021-09-30","document_id":"M1539","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT; ELECTRICAL SYSTEM","mfr_system":null,"summary":"SERVICE BULLETIN M1539: 30K WIRELESS HEADSET. PURPOSE: Revision. This service bulletin is to inform dealers of an available update to address 30K wireless headsets that have lost audio volume. 30K headsets that have been updated to software version 3.1 may experience a loss of audio. This can be repaired by updating the software on the headsets to version 3.2.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10202122-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10202122-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10202122","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HARLEY-DAVIDSON","model":"FLHTCUTGSE","year_from":2020,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLHTKSE","year_from":2020,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLHXSE","year_from":2020,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLTRXSE","year_from":2020,"year_to":2021,"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":[]}