MGU failure leading to car battery being completely drained and unable to run until replaced. Started with bearing noise coming from MGU alternator. Then check engine light came on. Before long a low voltage alarm appeared and was able to safely pull over before truck died. Truck is now unable to be driven until replacement of MGU. Dealer has been unable to source part for over a month and could be at least another month before part is ready to come in. Issue appears to be pretty common on 5.7 L Hemi E-torque Ram 1500’s as was told part on back order at this time for over 3,000 other customers