Alternator/generator/regulator problems of the 2009 BMW 328

Tl the contact owns a 2009 BMW 328i. While driving 68 mph, the vehicle stalled and the "malfunction in drive" and "malfunction in transmission" warning messages displayed. The contact was able to coast the vehcle onto the road shoulder and applied the parking brake to stop the vehicle. The vehicle was restarted, but continued to stall. The contact's family member replaced the alternator and battery, but the failure continued. The contact was able to drive the vehicle home. The manufacturer was contacted and stated that the vehicle was not included in NHTSA campaign number: 13v044000 (electrical system). The vehicle was not diagnosed or repaired. The dealer was not contacted. The approximate failure mileage was 83,000.

2009 328xi BMW first battery goes dead,one month later car stops while driving,BMW said it was fuel pump and hose,they fixed that,while at dealer they said faulty code came up for alternator . All this within 1 month. No signs of lights dim,car not starting,how does this happen all at once and with no warning. Seems there is a bigger issue. Dealer fixed fuel pump. But how does alternator go with no signs.