2014 REX with about 100K on the clock. Driving home and the car stalled, bucked and suddenly stopped with Drivetrain error. Could not get the car out of Park, so towed on a dolly to BMW dealer. After a little analysis, they said the HV battery pack needed replacing at a cost of $35,000 !! Of course the car is not worth a lot anyway, but nothing now. So, towed back to the house to look into options. The car is fully charged now and can move a little but has picked up ABS, TPMS and check engine lights that were not there previously. If you attempt to drive around the block, it will buck and stop suddenly and go into park with the Drivetrain error. If you turn the car off and back on, it will allow you to nudge it forward or reverse a little to get it off the street and into the garage. I have seen some suggestions about the 12V battery, and it really seems like something else than the HV battery that is the dealers only solution. Yes the battery is low on capacity, showing about 55 miles fully charged but I would think, even with diminished capacity, it would still be able to Good evening down the road, especially with the help by REX. Any suggestions would be greatly appreciated since I have had little luck finding a shop to look at it outside of the local ( Sarasota, FL. ) dealer.