Test the light at night in complete darkness for accuracy of the beam shining it on your garage door. Take pictures and post them up here. If it's a problem, take a picture of the odometer reading as well as the date, and if need be, forward all of that as evidence in an email, to your local BMW dealership service department for warranty repair. You have to document everything to get BMW to see that it truly is a warranty problem, and that it's not right.
Also report it to NHTSA here link>
NHTSA report a problem form.
Also report it to NHTSA here link>
NHTSA report a problem form.