Overview
- NHTSA action 25V643 covers exactly four vehicles in the United States: three 2026 BMW M4s and one 2026 BMW 430i.
- The affected cars were built between July 21 and July 23, 2025, within a narrowly defined production window.
- The defect involves the battery positive cable connection to the power-distribution block, which can loosen or overheat and potentially lead to an unexpected engine stall or, in extreme cases, smoldering or a fire.
- BMW identified the issue on August 7 during internal testing of a 2026 M4 Competition Cabrio and proceeded with a voluntary recall after a technical investigation.
- Owner notifications begin November 17, with free inspections at authorized dealers and parts replaced only if necessary, and no crashes or injuries have been reported to date.