One problem related to wiper has been reported for the 2018 BMW 330. The most recently reported issues are listed below.
I was on the capital beltway outside washington DC going about 60 mph and my sunroof suddenly shattered. It was extremely scary because it sounded like a gun shot going off. It was a very hot day, low 90s. Luckily I had just closed the sun visor so the glass did not pour down on me or my passengers. When we pulled over, we found a large hole in the front panel of the panoramic sunroof and shattered glass sitting on the fabric sun visor. The remaining glass was crackled. I just got this car, brand new, 2 weeks ago and I know it had been in a hail storm and had dents that had to be repaired just before I leased it. I'm suspicious that he hail storm may have damaged the sunroof glass as well.