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On our 03' v70 the windshield wipers have a "winey" like noise on the down stroke, and now have squeak as well, but all functions well. How or what needs to be fixed ?
I'd peer under the black plastic cowl piece and see if I could lube anything.
Carefully inspect while in there.
I'm not familiar with the system's details but I'd bet there are plastic bushings which may be worn.