NHTSA Complaint #11525811 — 2020 BMW X3

The issue is with the rear differential carrier bolt, Part # 33176760336. This bolt shears at the hex head and causes the differential assembly to misalign with the rest of the driveline components and causes further failures of the driveshaft and other items. Just in the past month I have seen several people post on the BMW X3M facebook groups and also on Internet forums about their broken bolt causing issues. The OEM bolt is a 10.9 grade bolt that does not appear to be able to take the stress put on it for daily driving. My car is exhibiting symptoms that others have heard in their cars before the failure occurred, Clunking when putting the car into drive or reverse. This can also be heard while going into second gear and driving at 5-20mph on light throttle then letting off the gas pedal and getting back on, this will cause the differential to clunk back onto the bolt and off. This is a failure due to a simple bolt component that could be enhanced by BMW to a higher tensile strength to avoid this situation from happening on the highway.