One problem related to battery cable has been reported for the 2003 BMW 530. The most recently reported issues are listed below.
The contact owns a 2003 BMW 530i. The contact stated that the battery failed several times. The vehicle was taken to the dealer on numerous occasions who advised the contact that there was nothing they could do to remedy the failure. The battery was replaced at that time but the failure persisted. The vehicle was taken to a local mechanic who inspected and discovered that the battery cables were faulty. The battery and battery cables were replaced. The manufacturer was notified who stated there were no recalls for the vehicle and offered no further assistance. The failure mileage was 1,500 and the current mileage was 86,000.