Was driving vehicle at approximately 45MPH, selected windshield sprayer to clean bugs off windshield, after a couple of full rotation of the windshield wipers, the passenger side wiper fell off and landed in spot that wipers stay while off. Upon inspection it appears that the affected wiper came apart where a spline disc that is supposed to be attached to wiper assembly, I pulled over and secured the loose parts before they slide off vehicle. The disc was still attached to the shaft that operates the wiper. In addition I found a key that apparently is part of the assembly, appears to have fell out and allowed components to separate. Obviously if this had occurred on highway at speed this could have been a hazard, as loose wiper blade might have departed vehicle and struck another vehicle or person. Not to mention the the loss of use during a rain storm would have caused visibility issues.

- Denison, TX, USA