Some may give you a hard time. However if you like it put it on. You paid for the Msport options so place one more where you want. Placing an X5M on a standard X5 is a poseur. Placing an M3 on a standard 3 is a poseur. Placing an M5 and fake exhausts on a 528 is a blatant liar. Every enthusiast knows there's not an X3M and you're not placing it on the rear anyway. You're not trying to deceive anyone. I think it would be subtle and fine. On the bottom grill would be even more subtle in my opinion. I stuck my BMWCCA logo underneath. Your car to tweak as you see fit.
1979 Porsche 911SC
1996 Porsche 993 C4S
2003 BMW M5
2013 BMW X3 35i
Last edited by bimmernut1; 06-27-2013 at 06:59 PM.