Originally Posted by Roleez
Two issues ...
1. Was the installed windshield the correct type/part# made specifically for BMWs equipped with rain sensors?
2. If the correct type of glass is in place, then was the car's rain sensor reprogrammed to accept the new/correct glass?
A yes for 1. and for 2. restores OEM operation.
I recently try got my rain sensor replaced and SA told me it needs to be programmed. So may be the point 2 is valid in your case.