BMW E90 or E83 Broken Engine Mount
This one has actually been documented by BMW in service bulletin # SI B22 01 10
As you can see by the pictures the engine mount bolts on the passenger-side of the engine break. This is because the bolts are aluminum / aluminum bolts are necessary on this engine because the engine block is made out of magnesium (!). Crazy but true. With this client he noticed a clunk on the passenger side of the car that sounded a lot like a bad CV axle or CV axle joint. Not the case. Here’s the pictures: