{"nhtsa_id":11021109,"type":"service_campaign","type_name":"Service campaign","date_added":"2025-07-31","date":"2025-07-30","document_id":"B340925","mfr_campaign":"0034200300","replaces":null,"component":"SERVICE BRAKES","mfr_system":null,"summary":"There may be an internal leakage in the brake fluid expansion tank (aka brake fluid reservoir). In the rare case of a leak, the filling level sensor might malfunction over a relatively long period of time.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11021109-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11021109-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11021109","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BMW","model":"330I","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_bmw_330i"]},{"make":"BMW","model":"430I","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_bmw_430i"]},{"make":"BMW","model":"M2","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_bmw_m2"]},{"make":"BMW","model":"M3","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_bmw_m3"]},{"make":"BMW","model":"M4","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_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":[]}