BMW X3 Service & Repair Manual > Body repair instructions: Notes for repairing aluminum rims
In general, the economic viability must be checked prior to the repair.
It is possible to repair the following damage (applies to cast aluminum rims labelled as AlSi7 AlSi11,
AlSi12):
Depth of the damage in the aluminum at maximum 1 mm
Distance of the damage from the outer rim edge at maxim ...