Do you have a Soviet-era Trabant from East Germany / DDR? If so, the electric Windshield Washer Pump has likely deteriorated. In particular, the Drive Coupling has likely stripped out. This is likely to fit other Eastern European cars of the period as well.
The design of the original is unusual and makes fitting a modern pump awkward, so while I was at it, I designed several variants of the Lid, including one with no holes at all (just add your own!) The One Hole version fit perfectly, see picture.
So far, I have only fitted the Drive Coupling and retainer… the lid is experimental and under development. Maybe I'll continue and replicate the entire pump… it is rather simple and shouldn't be too difficult to complete.
This is best printed in ABS or other material suited for automotive use.
The author hasn't provided the model origin yet.