I just replaced the wiper blades on my M and they also made noise at first. Once they were used a few times (I guess you could say broken themselves in) they were quiet again.
Cheers!
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2017 Porsche 718 Boxster Carerra White / Garnet Red / Black
2013 Porsche 991.1 911 Carrera S Platinum Silver Metallic / Black and Yellow accents
2014 F31 328i xDrive Alpine White / Black
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