If you did BMWWMN you should add a space. BMW WMN is easier for the eye to pick up.
Personally, custom tags are not for me, but to each his (her) own.
Jet black e92 6mt 335xi:
18" BBS RGRs, KW v1, ESS Stage 2 flash, VRSF 7" FMIC, VRSF downpipes, JG Mods m-tech front, mtec V3 AEs, BMS OCC, hardwired valentine 1, p3cars gauge, amber delete, sport seats, factory oil cooler.