If your E46 Convertible/Cabrio, Coupe (might also fit Touring/Sedan) front windows are rattling or making a clunking sound, this might resolve the problem. This print replaces the green plastic busings in the window regulator (BMW does not sell this separately). You don't need to disassemble the window regulator. However, you might need to loosen the window fasteners (inverted torx) in order to make it fit. If you are having a hard time installing it, try to sand down the edges. I highly recommend to print these in either ABS or preferably PETG.