If you hear hits on the windshield (in the lowest position) at speeds over 100 km/h and in maximum wiper mode, then there are large play in the left wiper linkage. The current solution is to replace it with a new one. It can be easily ordered, the part number is 85221-50140

Or a cheaper option. The problem occurs due to the play. A locking washer of appropriate diameter is inserted into the resulting gap. One that fits from the throttle shaft of the VAZ-2109 carburetor worked