There are three types of seat:
Sport Seat
This is the standard seat for all Z4 models
M-Sport Seat
This is the standard seat for all Z4 models
Z4M M-Sport Seat
Only found in M cars, these nappa (high quality leather) M-Sports seats are embossed on the headrest with the ///M motive. The leather stitching on each seat base bolster is a single piece of leather.