OEM Windscreen Question

[jonnysideways]

Dear all

I have just had my windscreen repaired, after a very nasty stone chip, and sadly, its left a mark.

I spoke to the auto windscreens engineer, who advise me that If I had it replaced they would not use a OEM windscreen.

I assume a none OEM screen may harm the cars value, and if this is the case, has anyone gotten thier insurance company to replace thier screen with the correct BMW OEM unit.

Thanks

John