I've seen one 128i registered in Germany & perhaps available for sale mentioned on 1er-forum.de. So there is certainly some overlap with at least euro 5. Euro 4 was 130i days.
128i Sport 6MT converted to Euro 130i spec, tuned by EVOLVE
In-progress: Evolve tune configuration!!; custom lip, some susp.
"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is Review