My dealer told me that the VIN is allocated once the car is scheduled for production, ie once it has a slot, they will be able to calcualte what it will be and can release it. I had mine before production too.
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'05 E90 325i | '06 E90 325i | '08 E90 325i LCI | '13 F30 328i M-Sport | '14 F10 535d M-Sport
Current: '19 G01 X3 M40i
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