{"nhtsa_id":10146643,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-11-05","date":"2017-04-01","document_id":"B540217","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"SERVICE ACTION: IMPLAUSIBLE SENSOR SIGNALS IN CONVERTIBLE ROOF SYSTEM. Signals from sensors in luggage compartment are being misinterpreted by the convertible top control module (CVM). This may lead to failure of the system to detect obstructions and cause damage to the hydraulics. Software error in the CVM.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10146643-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10146643-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10146643","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BMW","model":"428I","year_from":2014,"year_to":2016,"match":"exact","vehicle_ids":["2014_bmw_428i","2015_bmw_428i","2016_bmw_428i"]},{"make":"BMW","model":"435I","year_from":2014,"year_to":2016,"match":"exact","vehicle_ids":["2014_bmw_435i","2015_bmw_435i","2016_bmw_435i"]},{"make":"BMW","model":"M4","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_bmw_m4","2016_bmw_m4"]}],"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":[]}