{"nhtsa_id":10121510,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-10-31","date":"2013-11-01","document_id":"A911313 2034360-","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:ELECTRICAL","mfr_system":null,"summary":"Supersedes Technical Service Bulletin Group 91 number 13-89 dated July 3, 2013. Customer states that the BOSE sound system does not have enough bass. This bulletin only applies to vehicles with BOSE sound system. The current sound system equalization provides a flat frequency response, which many customers may perceive as not having enough bass.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10121510-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10121510-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10121510","components":[{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"AUDI","model":"A6","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_audi_a6","2012_audi_a6","2013_audi_a6"]}],"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":[]}