Your vehicle is equipped with the N57 engine, which is well known for its susceptibility to crankshaft main bearing failure. This issue is also seen in the 740d and 640d models, as well as in the 330d vehicles used by the police.
In 97% of cases, the engine is considered unusable. Rebuilding them is seldom feasible due to the deformation of the alloy cylinder block.
You have two viable alternatives: acquiring a high-quality pre-owned engine from a reliable dismantler, or selling the vehicle in its current condition.
Avoid pursuing the option of acquiring a refurbished engine.
