I have 330ci with the Performance Package (ZHP) and got hit in the back by a lady with a Aston Martin DB9 (think it's an aston martin). Anyways, my rear bumber is ripped and needs to be replaced. Insurance Company of the lady (Farmers) called me and claims they can replace my bumber with an aftermarket part as long as it is visually identical. Is this true? I assumed they would have to replace it with a genuine BMW part.