{"nhtsa_id":10194297,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-24","date":"2021-04-01","document_id":"B340521","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT; SERVICE BRAKES, AIR:DISC; EQUIPMENT ADAPTIVE/MOBILITY","mfr_system":null,"summary":"Diagnosis of Compound Brake System Complaints in M Vehicles: 1. Visible cracks are caused by high thermal stresses during rapid heating and cooling of the brake discs. Braking from high speed with cold brake components (less than 212 degrees F) increases the likelihood of cracks to form.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10194297-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10194297-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10194297","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BMW","model":"840I","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_bmw_840i","2021_bmw_840i"]},{"make":"BMW","model":"M8","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_bmw_m8","2021_bmw_m8"]},{"make":"BMW","model":"M8 GRAN COUPE","year_from":2020,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"M850I","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"M850I","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_bmw_m850i","2021_bmw_m850i"]},{"make":"BMW","model":"M850XI","year_from":2019,"year_to":2019,"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":[]}