SI B 22 01 09
"Prolonged heat exposure to the right side engine mount bracket, during the engine assembly process, may cause the bolts, which hold the engine bracket to the block, to lose the specified tightening torque."
I pre-emptively upgraded my bolts to the 10.9 bmw motorsport bolts + nord-lock washers with a high quality anti-seize.
Edit: Part numbers in this thread
BMW Motorsport Engine Mount Bolts.