Bosch Wiper anti-whistle

thingiverse

So my new Bosch windscreen wipers would whistle wildly above 40MPH, observing their design I see a hole cut right through the middle of the housing to function as a pivot point on the arm. Also, a perfect whistle is achieved. Just two minutes spent in Tinkercad and the problem was solved. These fit perfectly with the AP20U and AP13U wipers. Print at 100% because they press-fit nicely, the notch makes easy insertion a breeze.