When buying rear bumpers here is how to tell the difference between 3dr, 5dr and cabrio.
First 3 digits of part number: 8P3 is for a 3 door, 8P4 is for a 5 door..... AND 8P7 is for the cabriolet (be careful, there are a lot of cabrio rear bumpers floating around on ebay which are being advertised as 3 door!)
The easiest way to tell the difference between the three different types is..... the edge which meets the rear lights is flat for a 3dr, whereas the 5dr has an angled bit, and the cabrio bumper looks like the 3dr bumper but has a screw hole either side of where the tailgate closes.
3 door:
5 door:
Cabriolet:
