Originally Posted by Porschefile
OEM E9X M3 kidneys are actually pretty tough to pull off. If they come off on track there are either broken tabs or tabs that weren't in right.
+1. I replaced my kidneys with chrome black and it's very easy to break the clip holes (for lack of a better term) on the bumper (I broke a couple by accident). Break too many holes and the kidneys won't stay in place. Hopefully, the kidneys are just missing some tabs, which would mean replacing the kidneys. If not, you're probably looking at a new front bumper. Good luck!