[kenhwang]

I actually don't think they're outsourced and they're typically designed in-house. I remember the reason being the windshield wipers are almost always engineered last after almost everything else in the engine compartment. So the wiper engineers are typically given very oddly shaped small spaces that they have to fit the wiper system into, and those differ between cars so it can't just be generically outsourced.

Here's a Hyundai engineer talking about wipers: https://www.digitalengineering247.com/article/the-back-and-f...