Windshield Wiper motor

Just so you know... The plastic part that failed may have been OEM. Lasted a long time huh? Keep in mind that all the bushings are the same age so all should be replaced at same time. When the replacements last only a year or 3, the owners tend to place blame on the quality of the replacement plastics. True cause of repeating failure is binding in worn pivot post assemblies. Although the assembly is about 3 inches long, the bronze bushings at each end are only 1/2 inch long. Between the bushings is a rusty steel shaft in hollow cast metal sleeve.
We have a member here who properly renews door hinges but I'm not aware of any one anywhere who renews the wiper pivots.
Seal kits are available that can stop or at least slow the water leak into the cabin. Those kits include zerk grease fittings so you can fill the hollow cavity with grease. Notice that the pivot movement is only 180 degrees. So before you take them down to reseal, mark bottom of the housing with a sharpie. When you replace them on the 2 studs, rotate your mark 180 degrees (out of sight). This will put the worn part of the shaft on a much lesser worn side/wall of the bushings. Result is smoother and quieter wiper operation and longer life of those plastic parts.