You need to give us a LOT more info.
Why wouldn't this be covered under warranty?
Mods?
What happened prior to "would not start"?
What do you mean "un-seized"?
What was done to "un-seize" it?
When you say BMW, are you referring to a dealer?
If a dealer, have you taken it to an independent shop?
Why are you calling a shop in FL if you are in NY?
Your post is super mysterious and missing way too much info for anyone to be helpful.
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