There are no power modifications to my vehicle, I just recently installed a lower mileage engine, along with all of the parts surrounding the engine and transmission (ie clutch, flywheel, throwout bearing, clutch fork, etc). The break-in period for a new clutch is 500 miles of normal driving and 1000 miles for the engine. I completed the break-in period on Saturday July 20, 2019, for the clutch but still have some miles to go for the engine break-in, so on 7-24-19 I was entering the fwy from a stop light and when I pushed the gas peadal it sounded like something exploded and I hadn't even gotten out of 1st gear yet!!! so, I pulled over to the side of the road, B/C I heard something rubbing, and called a tow truck to tow it back to the shop that had just installed the new engine. The shop contacted me with news and pictures, showing me that the factory welds on the differential's subframe mount had snapped apart, dropping the differential from its correct position and destroying my driveshaft, in the process. I called BMW of North America and they said there's a recall for the M3 subframe but not the M5"?" then goes on to say with the age and mileage...but welds are supposed to withstand age and mileage, especially being that it's a sports sedan design to shred tyres and achieve 3-digit speeds. The internet is flooded with the very same incidents with other M5 owners but it seems no one else has bothered to voice their concerns B/C if it had not been for the exhaust system then the driveshaft would have dropped to the ground and flipped my car into freeway traffic (see photos)

- Fallbrook, CA, USA