I disagree that the manufacturer will brush this off. As this is a safety feature and as long as your sensors were not tinkered with, they should compensate you on your damages. Unlike your engine and trasmission warranty, safety features likely will not pass the reasonableness test of the "warranty life argument" in court.
If the dealer attempts to brush it off you need to take this to BMW North America. I bet you that you'll get compensated for damages. If not, I would threaten a lawsuit.
Is your front bumper, steering wheel or column, or car modified in any way that can cause your senor to malfunction?